diff --git a/README.md b/README.md
index b3e4ce5..9556fcc 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,4 @@
+<!-- markdownlint-disable MD024 -->
 # ico
 
 ![badge](https://github.com/fiahfy/ico/workflows/Node.js%20Package/badge.svg)
@@ -19,7 +20,7 @@ import fs from 'fs'
 import Ico from '@fiahfy/ico'
 
 const buf = fs.readFileSync('icon.ico')
-const ico = new Ico(buf)
+const ico = Ico.from(buf)
 console.log(ico.fileHeader) // IcoFileHeader { reserved: 0, type: 1, count: 7 }
 console.log(ico.infoHeaders[0]) // IcoInfoHeader { width: 16, height: 16, ... }
 ```
@@ -34,16 +35,138 @@ const ico = new Ico()
 let buf
 
 buf = fs.readFileSync('128x128.png')
-await ico.appendImage(buf)
+image = IcoImage.fromPNG(buf)
+ico.append(image)
 
 buf = fs.readFileSync('256x256.png')
-await ico.appendImage(buf)
+image = IcoImage.fromPNG(buf)
+ico.append(image)
 
 /* Some other PNG files */
 
 fs.writeFileSync('icon.ico', ico.data)
 ```
 
+## API
+
+### Class: Ico
+
+#### static from(buffer)
+
+Create ICO from the icon buffer.
+
+##### buffer
+
+Type: `Buffer`
+
+The ICO icon buffer.
+
+#### append(image)
+
+Adds ICO image at the end.
+
+##### image
+
+Type: `IcoImage`
+
+The ICO Image to append.
+
+#### insert(image, index)
+
+Inserts ICO image at the specified position.
+
+##### image
+
+Type: `IcoImage`
+
+The ICO Image to insert.
+
+##### index
+
+Type: `number`
+
+The position at which to insert the ICO Image.
+
+#### remove(index)
+
+Removes ICO image at the specified position.
+
+##### index
+
+Type: `number`
+
+The position of the ICO Image to remove.
+
+#### fileHeader
+
+Type: `IcoFileHeader`
+
+Return the file header on the ICO.
+
+#### infoHeaders
+
+Type: `IcoInfoHeader[]`
+
+Return the ICO info header on the ICO.
+
+#### images
+
+Type: `IcoImage[]`
+
+Return the ICO images on the ICO.
+
+#### data
+
+Type: `Buffer`
+
+Return the ICO buffer.
+
+### Class: IcoImage
+
+#### static from(buffer)
+
+Create ICO image from the buffer.
+
+##### buffer
+
+Type: `Buffer`
+
+The ICO image buffer.
+
+#### static fromPNG(buffer)
+
+Create ICO Image from the PNG image buffer.
+
+##### buffer
+
+Type: `Buffer`
+
+The PNG image buffer.
+
+### Class: IcoInfoHeader
+
+#### static from(buffer)
+
+Create ICO info header from the buffer.
+
+##### buffer
+
+Type: `Buffer`
+
+The ICO info header buffer.
+
+### Class: IcoFileHeader
+
+#### static from(buffer)
+
+Create ICO file header from the buffer.
+
+##### buffer
+
+Type: `Buffer`
+
+The ICO file header buffer.
+
 ## Specifications
 
 ### Supported Size
diff --git a/package.json b/package.json
index dcd52b6..4faecaa 100644
--- a/package.json
+++ b/package.json
@@ -11,13 +11,14 @@
     "url": "https://github.com/fiahfy/ico/issues"
   },
   "dependencies": {
-    "jimp": "^0.8.5"
+    "pngjs": "^3.4.0"
   },
   "devDependencies": {
-    "@types/jest": "^24.0.22",
+    "@types/jest": "^24.0.23",
     "@types/node": "^12.12.7",
-    "@typescript-eslint/eslint-plugin": "^2.6.1",
-    "@typescript-eslint/parser": "^2.6.1",
+    "@types/pngjs": "^3.4.0",
+    "@typescript-eslint/eslint-plugin": "^2.7.0",
+    "@typescript-eslint/parser": "^2.7.0",
     "eslint": "^6.6.0",
     "eslint-config-prettier": "^6.5.0",
     "eslint-plugin-prettier": "^3.1.1",
@@ -26,9 +27,6 @@
     "ts-jest": "^24.1.0",
     "typescript": "^3.7.2"
   },
-  "engines": {
-    "node": ">=8"
-  },
   "files": [
     "dist"
   ],
diff --git a/src/bitmap-info-header.ts b/src/bitmap-info-header.ts
index f4655aa..96d2de6 100644
--- a/src/bitmap-info-header.ts
+++ b/src/bitmap-info-header.ts
@@ -1,5 +1,5 @@
 export class BitmapInfoHeader {
-  readonly size: number
+  readonly size: 40
   readonly width: number
   readonly height: number
   readonly planes: number
@@ -12,7 +12,7 @@ export class BitmapInfoHeader {
   readonly clrImportant: number
 
   constructor(
-    size = 40,
+    size: 40 = 40,
     width = 0,
     height = 0,
     planes = 0,
@@ -42,7 +42,7 @@ export class BitmapInfoHeader {
    * @param buffer The bitmap info header.
    */
   static from(buffer: Buffer): BitmapInfoHeader {
-    const size = buffer.readUInt32LE(0)
+    const size = buffer.readUInt32LE(0) as 40
     const width = buffer.readInt32LE(4)
     const height = buffer.readInt32LE(8)
     const planes = buffer.readUInt16LE(12)
diff --git a/src/ico-image.ts b/src/ico-image.ts
index 8a4199a..eda20a3 100644
--- a/src/ico-image.ts
+++ b/src/ico-image.ts
@@ -1,5 +1,6 @@
-import { Bitmap } from 'jimp'
+import { PNG } from 'pngjs'
 import { BitmapInfoHeader } from './bitmap-info-header'
+import { Ico } from './ico'
 
 export class IcoImage {
   readonly header: BitmapInfoHeader
@@ -41,41 +42,42 @@ export class IcoImage {
     return new IcoImage(header, xor, and)
   }
 
-  static create(bitmap: Bitmap): IcoImage {
-    const width = bitmap.width
-    const height = bitmap.height * 2 // image + mask
-    const planes = 1
-    const bitCount = (bitmap as any).bpp * 8 // byte per pixel * 8
+  /**
+   * Create ICO Image from the PNG image buffer.
+   * @param buffer The PNG image buffer.
+   */
+  static fromPNG(buffer: Buffer): IcoImage {
+    const png = IcoImage.readPNG(buffer)
+    if (!png) {
+      throw new TypeError('Image must be PNG format')
+    }
 
-    const xorSize = bitmap.height * bitmap.width * (bitmap as any).bpp
-    const andSize =
-      ((bitmap.width + (bitmap.width % 32 ? 32 - (bitmap.width % 32) : 0)) *
-        bitmap.height) /
-      8
-    const sizeImage = xorSize + andSize
+    const width = png.width
+    let height = png.height
+    if (width !== height) {
+      throw new TypeError('Image must be squre')
+    }
+    const supported = Ico.supportedIconSizes.includes(width)
+    if (!supported) {
+      throw new TypeError('No supported size')
+    }
 
-    const header = new BitmapInfoHeader(
-      40,
-      width,
-      height,
-      planes,
-      bitCount,
-      0,
-      sizeImage
-    )
+    height *= 2 // image + mask
+    const planes = 1
+    const bitCount = (png as any).bpp * 8 // byte per pixel * 8
 
     const xors = []
     let andBits: number[] = []
 
     // Convert Top/Left to Bottom/Left
-    for (let y = bitmap.height - 1; y >= 0; y--) {
-      for (let x = 0; x < bitmap.width; x++) {
+    for (let y = height - 1; y >= 0; y--) {
+      for (let x = 0; x < width; x++) {
         // RGBA to BGRA
-        const pos = (y * bitmap.width + x) * (bitmap as any).bpp
-        const red = bitmap.data.slice(pos, pos + 1)
-        const green = bitmap.data.slice(pos + 1, pos + 2)
-        const blue = bitmap.data.slice(pos + 2, pos + 3)
-        const alpha = bitmap.data.slice(pos + 3, pos + 4)
+        const pos = (y * width + x) * (png as any).bpp
+        const red = png.data.slice(pos, pos + 1)
+        const green = png.data.slice(pos + 1, pos + 2)
+        const blue = png.data.slice(pos + 2, pos + 3)
+        const alpha = png.data.slice(pos + 3, pos + 4)
         xors.push(blue)
         xors.push(green)
         xors.push(red)
@@ -95,8 +97,18 @@ export class IcoImage {
       ands.push(buffer)
     }
 
-    const xor = Buffer.concat(xors, xorSize)
-    const and = Buffer.concat(ands, andSize)
+    const xor = Buffer.concat(xors)
+    const and = Buffer.concat(ands)
+
+    const header = new BitmapInfoHeader(
+      40,
+      width,
+      height,
+      planes,
+      bitCount,
+      0,
+      xor.length + and.length
+    )
 
     return new IcoImage(header, xor, and)
   }
@@ -105,4 +117,12 @@ export class IcoImage {
     const buffers = [this.header.data, this.xor, this.and]
     return Buffer.concat(buffers)
   }
+
+  private static readPNG(buffer: Buffer): PNG | undefined {
+    try {
+      return PNG.sync.read(buffer)
+    } catch (e) {
+      return undefined
+    }
+  }
 }
diff --git a/src/ico.ts b/src/ico.ts
index 3cc48de..67161da 100644
--- a/src/ico.ts
+++ b/src/ico.ts
@@ -1,8 +1,6 @@
-import Jimp from 'jimp'
 import { IcoFileHeader } from './ico-file-header'
 import { IcoInfoHeader } from './ico-info-header'
 import { IcoImage } from './ico-image'
-import { file } from '@babel/types'
 
 export class Ico {
   static readonly supportedIconSizes = [16, 24, 32, 48, 64, 128, 256]
@@ -54,36 +52,51 @@ export class Ico {
     return this._infoHeaders
   }
 
-  set infoHeaders(infoHeaders: ReadonlyArray<IcoInfoHeader>) {
-    this._infoHeaders = infoHeaders
+  get images(): ReadonlyArray<IcoImage> {
+    return this._images
+  }
 
-    const count = this._infoHeaders.length
+  set images(images: ReadonlyArray<IcoImage>) {
+    this._images = images
 
     this._fileHeader = new IcoFileHeader(
       this._fileHeader.reserved,
       this._fileHeader.type,
-      count
+      this._images.length
     )
-  }
 
-  get images(): ReadonlyArray<IcoImage> {
-    return this._images
-  }
-
-  set images(images: ReadonlyArray<IcoImage>) {
-    this._images = images
+    const infoHeaders = this._images.map((image) => {
+      return new IcoInfoHeader(
+        image.header.width < 256 ? image.header.width : 0,
+        image.header.height < 256 ? image.header.height : 0,
+        0,
+        0,
+        image.header.planes,
+        image.header.bitCount,
+        image.data.length
+      )
+    })
 
     let imageOffset =
       this._fileHeader.data.length +
-      this._infoHeaders.reduce(
+      infoHeaders.reduce(
         (carry, infoHeader) => carry + infoHeader.data.length,
         0
       )
 
-    const infoHeaders = this._infoHeaders.map((infoHeader) => {
-      infoHeader.imageOffset = imageOffset
-      imageOffset += infoHeader.bytesInRes
-      return infoHeader
+    this._infoHeaders = infoHeaders.map((infoHeader) => {
+      const header = new IcoInfoHeader(
+        infoHeader.width,
+        infoHeader.height,
+        infoHeader.colorCount,
+        infoHeader.reserved,
+        infoHeader.planes,
+        infoHeader.bitCount,
+        infoHeader.bytesInRes,
+        imageOffset
+      )
+      imageOffset += header.bytesInRes
+      return header
     })
   }
 
@@ -96,48 +109,35 @@ export class Ico {
     return Buffer.concat(buffers)
   }
 
-  async appendImage(buffer: Buffer): Promise<void> {
-    await this.insertImage(buffer, this.fileHeader.count)
+  /**
+   * Adds ICO image at the end.
+   * @param image The ICO Image to append.
+   */
+  append(image: IcoImage): void {
+    this.images = [...this.images, image]
   }
-  async insertImage(buffer: Buffer, index: number): Promise<void> {
-    const image = await Jimp.read(buffer)
-    if (image.getMIME() !== Jimp.MIME_PNG) {
-      throw new TypeError('Image must be png format')
-    }
-    if (image.getWidth() !== image.getHeight()) {
-      throw new TypeError('Image must be squre')
-    }
-    const size = image.getWidth()
-    if (!Ico.supportedSizes.includes(size)) {
-      throw new TypeError('No supported Size')
-    }
-
-    const icoImage = IcoImage.create(image.bitmap)
-
-    const width = size < 256 ? size : 0
-    const height = size < 256 ? size : 0
-    const planes = icoImage.header.planes
-    const bitCount = icoImage.header.bitCount
-    const bytesInRes = icoImage.data.length
-    const infoHeader = new IcoInfoHeader(
-      width,
-      height,
-      0,
-      0,
-      planes,
-      bitCount,
-      bytesInRes
-    )
 
-    this.infoHeaders[index] = infoHeader
-    this.images[index] = icoImage
-
-    this.resetHeader()
+  /**
+   * Inserts ICO image at the specified position.
+   * @param image The ICO Image to insert.
+   * @param index The position at which to insert the ICO Image.
+   */
+  insert(image: IcoImage, index: number): void {
+    this.images = [
+      ...this.images.slice(0, index),
+      image,
+      ...this.images.slice(index + 1)
+    ]
   }
-  removeImage(index: number): void {
-    this.infoHeaders.splice(index, 1)
-    this.images.splice(index, 1)
 
-    this.resetHeader()
+  /**
+   * Removes ICO image at the specified position.
+   * @param index The position of the ICO Image to remove.
+   */
+  remove(index: number): void {
+    this.images = [
+      ...this.images.slice(0, index),
+      ...this.images.slice(index + 1)
+    ]
   }
 }
diff --git a/test/16x16.png b/test/16x16.png
new file mode 100644
index 0000000..708c179
Binary files /dev/null and b/test/16x16.png differ
diff --git a/test/bitmap-info-header.test.ts b/test/bitmap-info-header.test.ts
new file mode 100644
index 0000000..8212103
--- /dev/null
+++ b/test/bitmap-info-header.test.ts
@@ -0,0 +1,50 @@
+import { BitmapInfoHeader } from '../src'
+
+describe('BitmapInfoHeader', () => {
+  describe('constructor', () => {
+    test('should work', () => {
+      const header = new BitmapInfoHeader()
+      expect(header.size).toBe(40)
+      expect(header.width).toBe(0)
+      expect(header.height).toBe(0)
+      expect(header.planes).toBe(0)
+      expect(header.bitCount).toBe(0)
+      expect(header.compression).toBe(0)
+      expect(header.sizeImage).toBe(0)
+      expect(header.xPelsPerMeter).toBe(0)
+      expect(header.yPelsPerMeter).toBe(0)
+      expect(header.clrUsed).toBe(0)
+      expect(header.clrImportant).toBe(0)
+    })
+  })
+
+  describe('from', () => {
+    test('should work', () => {
+      const buffer = Buffer.alloc(40)
+      buffer.writeUInt32LE(40, 0)
+      buffer.writeInt32LE(32, 4)
+      buffer.writeInt32LE(32, 8)
+      buffer.writeUInt16LE(4, 12)
+      buffer.writeUInt16LE(32, 14)
+      buffer.writeUInt32LE(1, 16)
+      buffer.writeUInt32LE(512, 20)
+      buffer.writeInt32LE(1, 24)
+      buffer.writeInt32LE(1, 28)
+      buffer.writeUInt32LE(1, 32)
+      buffer.writeUInt32LE(1, 36)
+
+      const header = BitmapInfoHeader.from(buffer)
+      expect(header.size).toBe(40)
+      expect(header.width).toBe(32)
+      expect(header.height).toBe(32)
+      expect(header.planes).toBe(4)
+      expect(header.bitCount).toBe(32)
+      expect(header.compression).toBe(1)
+      expect(header.sizeImage).toBe(512)
+      expect(header.xPelsPerMeter).toBe(1)
+      expect(header.yPelsPerMeter).toBe(1)
+      expect(header.clrUsed).toBe(1)
+      expect(header.clrImportant).toBe(1)
+    })
+  })
+})
diff --git a/test/ico-file-header.test.ts b/test/ico-file-header.test.ts
new file mode 100644
index 0000000..27d8916
--- /dev/null
+++ b/test/ico-file-header.test.ts
@@ -0,0 +1,26 @@
+import { IcoFileHeader } from '../src'
+
+describe('IcoFileHeader', () => {
+  describe('constructor', () => {
+    test('should work', () => {
+      const header = new IcoFileHeader()
+      expect(header.reserved).toBe(0)
+      expect(header.type).toBe(1)
+      expect(header.count).toBe(0)
+    })
+  })
+
+  describe('from', () => {
+    test('should work', () => {
+      const buffer = Buffer.alloc(6)
+      buffer.writeUInt16LE(1, 0)
+      buffer.writeUInt16LE(2, 2)
+      buffer.writeUInt16LE(3, 4)
+
+      const header = IcoFileHeader.from(buffer)
+      expect(header.reserved).toBe(1)
+      expect(header.type).toBe(2)
+      expect(header.count).toBe(3)
+    })
+  })
+})
diff --git a/test/ico-image.test.ts b/test/ico-image.test.ts
new file mode 100644
index 0000000..8952793
--- /dev/null
+++ b/test/ico-image.test.ts
@@ -0,0 +1,32 @@
+import fs from 'fs'
+import { IcoImage } from '../src'
+
+describe('IcoImage', () => {
+  describe('constructor', () => {
+    test('should work', () => {
+      const image = new IcoImage()
+      expect(image.header.data.length).toBe(40)
+      expect(image.xor.length).toBe(0)
+      expect(image.and.length).toBe(0)
+    })
+  })
+
+  describe('fromPNG', () => {
+    test('should work', () => {
+      const buffer = fs.readFileSync('./test/256x256.png')
+      expect(() => IcoImage.fromPNG(buffer)).not.toThrowError()
+    })
+    test('should throw error if buffer is not PNG format', () => {
+      const buffer = fs.readFileSync('./test/256x256.jpg')
+      expect(() => IcoImage.fromPNG(buffer)).toThrowError(TypeError)
+    })
+    test('should throw error if buffer is not square', () => {
+      const buffer = fs.readFileSync('./test/256x128.png')
+      expect(() => IcoImage.fromPNG(buffer)).toThrowError(TypeError)
+    })
+    test('should throw error if buffer is not supported size', () => {
+      const buffer = fs.readFileSync('./test/100x100.png')
+      expect(() => IcoImage.fromPNG(buffer)).toThrowError(TypeError)
+    })
+  })
+})
diff --git a/test/ico-info-header.test.ts b/test/ico-info-header.test.ts
new file mode 100644
index 0000000..7bc5d5d
--- /dev/null
+++ b/test/ico-info-header.test.ts
@@ -0,0 +1,41 @@
+import { IcoInfoHeader } from '../src'
+
+describe('IcoInfoHeader', () => {
+  describe('constructor', () => {
+    test('should work', () => {
+      const header = new IcoInfoHeader()
+      expect(header.width).toBe(0)
+      expect(header.height).toBe(0)
+      expect(header.colorCount).toBe(0)
+      expect(header.reserved).toBe(0)
+      expect(header.planes).toBe(0)
+      expect(header.bitCount).toBe(0)
+      expect(header.bytesInRes).toBe(0)
+      expect(header.imageOffset).toBe(0)
+    })
+  })
+
+  describe('from', () => {
+    test('should work', () => {
+      const buffer = Buffer.alloc(16)
+      buffer.writeUInt8(32, 0)
+      buffer.writeUInt8(32, 1)
+      buffer.writeUInt8(4, 2)
+      buffer.writeUInt8(1, 3)
+      buffer.writeUInt16LE(4, 4)
+      buffer.writeUInt16LE(32, 6)
+      buffer.writeUInt32LE(128, 8)
+      buffer.writeUInt32LE(256, 12)
+
+      const header = IcoInfoHeader.from(buffer)
+      expect(header.width).toBe(32)
+      expect(header.height).toBe(32)
+      expect(header.colorCount).toBe(4)
+      expect(header.reserved).toBe(1)
+      expect(header.planes).toBe(4)
+      expect(header.bitCount).toBe(32)
+      expect(header.bytesInRes).toBe(128)
+      expect(header.imageOffset).toBe(256)
+    })
+  })
+})
diff --git a/test/ico.test.ts b/test/ico.test.ts
new file mode 100644
index 0000000..fd819b7
--- /dev/null
+++ b/test/ico.test.ts
@@ -0,0 +1,151 @@
+import fs from 'fs'
+import { Ico, IcoImage, IcoFileHeader } from '../src'
+
+describe('Ico', () => {
+  describe('constructor', () => {
+    test('should work', () => {
+      const ico = new Ico()
+      expect(ico.fileHeader).toEqual(new IcoFileHeader())
+      expect(ico.infoHeaders).toEqual([])
+      expect(ico.images).toEqual([])
+    })
+  })
+
+  describe('from', () => {
+    test('should work', () => {
+      const buffer = fs.readFileSync('./test/icon.ico')
+      const ico = Ico.from(buffer)
+      expect(ico.images.length).toBe(7)
+    })
+  })
+
+  describe('set images', () => {
+    test('should work', () => {
+      const ico = new Ico()
+      const buffer = fs.readFileSync('./test/16x16.png')
+      const firstBytes = ico.data.length
+      let image: IcoImage, prevBytes: number
+
+      prevBytes = ico.data.length
+      image = IcoImage.fromPNG(buffer)
+      ico.images = [...ico.images, image]
+      expect(ico.images.length).toBe(1)
+      expect(ico.infoHeaders.length).toBe(1)
+      expect(ico.infoHeaders[0].bytesInRes).toBe(image.data.length)
+      expect(ico.data.length).toBe(
+        prevBytes + ico.infoHeaders[0].data.length + image.data.length
+      )
+      expect(ico.infoHeaders[0].imageOffset).toBe(
+        ico.fileHeader.data.length +
+          ico.infoHeaders.reduce(
+            (carry, infoHeader) => carry + infoHeader.data.length,
+            0
+          )
+      )
+
+      prevBytes = ico.data.length
+      image = IcoImage.fromPNG(buffer)
+      ico.images = [...ico.images, image]
+      expect(ico.images.length).toBe(2)
+      expect(ico.infoHeaders.length).toBe(2)
+      expect(ico.infoHeaders[1].bytesInRes).toBe(image.data.length)
+      expect(ico.data.length).toBe(
+        prevBytes + ico.infoHeaders[1].data.length + image.data.length
+      )
+      expect(ico.infoHeaders[0].imageOffset).toBe(
+        ico.fileHeader.data.length +
+          ico.infoHeaders.reduce(
+            (carry, infoHeader) => carry + infoHeader.data.length,
+            0
+          )
+      )
+      expect(ico.infoHeaders[1].imageOffset).toBe(
+        ico.infoHeaders[0].imageOffset + ico.infoHeaders[0].bytesInRes
+      )
+
+      prevBytes = ico.data.length
+      image = IcoImage.fromPNG(buffer)
+      ico.images = [...ico.images, image]
+      expect(ico.images.length).toBe(3)
+      expect(ico.infoHeaders.length).toBe(3)
+      expect(ico.infoHeaders[2].bytesInRes).toBe(image.data.length)
+      expect(ico.data.length).toBe(
+        prevBytes + ico.infoHeaders[2].data.length + image.data.length
+      )
+      expect(ico.infoHeaders[0].imageOffset).toBe(
+        ico.fileHeader.data.length +
+          ico.infoHeaders.reduce(
+            (carry, infoHeader) => carry + infoHeader.data.length,
+            0
+          )
+      )
+      expect(ico.infoHeaders[1].imageOffset).toBe(
+        ico.infoHeaders[0].imageOffset + ico.infoHeaders[0].bytesInRes
+      )
+      expect(ico.infoHeaders[2].imageOffset).toBe(
+        ico.infoHeaders[0].imageOffset +
+          ico.infoHeaders[0].bytesInRes +
+          ico.infoHeaders[1].bytesInRes
+      )
+
+      prevBytes = ico.data.length
+      ico.images = []
+      expect(ico.images.length).toBe(0)
+      expect(ico.infoHeaders.length).toBe(0)
+      expect(ico.data.length).toBe(firstBytes)
+    })
+  })
+
+  describe('append', () => {
+    test('should work', () => {
+      const ico = new Ico()
+      const buffer = fs.readFileSync('./test/16x16.png')
+      let image: IcoImage
+
+      image = IcoImage.fromPNG(buffer)
+      ico.append(image)
+      expect(ico.images.length).toBe(1)
+
+      image = IcoImage.fromPNG(buffer)
+      ico.append(image)
+      expect(ico.images.length).toBe(2)
+    })
+  })
+
+  describe('insert', () => {
+    test('should work', () => {
+      const ico = new Ico()
+      const buffer = fs.readFileSync('./test/16x16.png')
+      let image: IcoImage
+
+      image = IcoImage.fromPNG(buffer)
+      ico.insert(image, 0)
+      expect(ico.images.length).toBe(1)
+
+      image = IcoImage.fromPNG(buffer)
+      ico.insert(image, 0)
+      expect(ico.images.length).toBe(1)
+
+      image = IcoImage.fromPNG(buffer)
+      ico.insert(image, 1)
+      expect(ico.images.length).toBe(2)
+    })
+  })
+
+  describe('remove', () => {
+    test('should work', () => {
+      const ico = new Ico()
+      const buffer = fs.readFileSync('./test/16x16.png')
+
+      ico.images = [
+        IcoImage.fromPNG(buffer),
+        IcoImage.fromPNG(buffer),
+        IcoImage.fromPNG(buffer)
+      ]
+      expect(ico.images.length).toBe(3)
+
+      ico.remove(0)
+      expect(ico.images.length).toBe(2)
+    })
+  })
+})
diff --git a/test/sample.ico b/test/icon.ico
similarity index 100%
rename from test/sample.ico
rename to test/icon.ico
diff --git a/test/index.test.ts b/test/index.test.ts
deleted file mode 100644
index 6d2eb1f..0000000
--- a/test/index.test.ts
+++ /dev/null
@@ -1,68 +0,0 @@
-import fs from 'fs'
-import Ico from '../src'
-
-describe('ico', () => {
-  describe('constructor', () => {
-    test('should work', async () => {
-      const ico = new Ico()
-      expect(ico.fileHeader.count).toBe(0)
-      expect(ico.infoHeaders.length).toBe(0)
-      expect(ico.images.length).toBe(0)
-    })
-
-    test('should work with buffer', async () => {
-      const buf = fs.readFileSync('./test/sample.ico')
-      const ico = new Ico(buf)
-      expect(ico.fileHeader.count).toBe(7)
-      expect(ico.infoHeaders.length).toBe(7)
-      expect(ico.images.length).toBe(7)
-    })
-  })
-
-  describe('data property', () => {
-    test('should work', () => {
-      const ico = new Ico()
-      expect(ico.data.length).toBeGreaterThan(0)
-      ico.data = fs.readFileSync('./test/sample.ico')
-      expect(ico.fileHeader.count).toBe(7)
-      expect(ico.infoHeaders.length).toBe(7)
-      expect(ico.images.length).toBe(7)
-    })
-  })
-
-  describe('appendImage', () => {
-    test('should work', async () => {
-      const buf = fs.readFileSync('./test/256x256.png')
-      const ico = new Ico()
-      expect(ico.fileHeader.count).toBe(0)
-      expect(ico.infoHeaders.length).toBe(0)
-      expect(ico.images.length).toBe(0)
-      await ico.appendImage(buf)
-      expect(ico.fileHeader.count).toBe(1)
-      expect(ico.infoHeaders.length).toBe(1)
-      expect(ico.images.length).toBe(1)
-      await ico.appendImage(buf)
-      expect(ico.fileHeader.count).toBe(2)
-      expect(ico.infoHeaders.length).toBe(2)
-      expect(ico.images.length).toBe(2)
-    })
-
-    test('should throw error if buffer is not PNG format', () => {
-      const buf = fs.readFileSync('./test/256x256.jpg')
-      const ico = new Ico()
-      expect(ico.appendImage(buf)).rejects.toThrowError(TypeError)
-    })
-
-    test('should throw error if buffer is not square', () => {
-      const buf = fs.readFileSync('./test/256x128.png')
-      const ico = new Ico()
-      expect(ico.appendImage(buf)).rejects.toThrowError(TypeError)
-    })
-
-    test('should throw error if buffer is not supported size', () => {
-      const buf = fs.readFileSync('./test/100x100.png')
-      const ico = new Ico()
-      expect(ico.appendImage(buf)).rejects.toThrowError(TypeError)
-    })
-  })
-})
diff --git a/yarn.lock b/yarn.lock
index 5a851c4..8c3327e 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -305,258 +305,6 @@
     "@types/istanbul-reports" "^1.1.1"
     "@types/yargs" "^13.0.0"
 
-"@jimp/bmp@^0.8.5":
-  version "0.8.5"
-  resolved "https://registry.yarnpkg.com/@jimp/bmp/-/bmp-0.8.5.tgz#94437fa0f4dda5cf0233005640f39f75647c53ba"
-  integrity sha512-o/23j1RODQGGjvb2xg+9ZQCHc9uXa5XIoJuXHN8kh8AJBGD7JZYiHMwNHaxJRJvadimCKUeA5udZUJAoaPwrYg==
-  dependencies:
-    "@jimp/utils" "^0.8.5"
-    bmp-js "^0.1.0"
-    core-js "^2.5.7"
-
-"@jimp/core@^0.8.5":
-  version "0.8.5"
-  resolved "https://registry.yarnpkg.com/@jimp/core/-/core-0.8.5.tgz#925549488916f1b9d71a4f248b023f9e8f969d7f"
-  integrity sha512-Jto1IdL5HYg7uE15rpQjK6dfZJ6d6gRjUsVCPW50nIfXgWizaTibFEov90W9Bj+irwKrX2ntG3e3pZUyOC0COg==
-  dependencies:
-    "@jimp/utils" "^0.8.5"
-    any-base "^1.1.0"
-    buffer "^5.2.0"
-    core-js "^2.5.7"
-    exif-parser "^0.1.12"
-    file-type "^9.0.0"
-    load-bmfont "^1.3.1"
-    mkdirp "0.5.1"
-    phin "^2.9.1"
-    pixelmatch "^4.0.2"
-    tinycolor2 "^1.4.1"
-
-"@jimp/custom@^0.8.5":
-  version "0.8.5"
-  resolved "https://registry.yarnpkg.com/@jimp/custom/-/custom-0.8.5.tgz#68131a5d7e8776d3aafc5aa7ba207405fde5c361"
-  integrity sha512-hS4qHOcOIL+N93IprsIhFgr8F4XnC2oYd+lRaOKEOg3ptS2vQnceSTtcXsC0//mhq8AV6lNjpbfs1iseEZuTqg==
-  dependencies:
-    "@jimp/core" "^0.8.5"
-    core-js "^2.5.7"
-
-"@jimp/gif@^0.8.5":
-  version "0.8.5"
-  resolved "https://registry.yarnpkg.com/@jimp/gif/-/gif-0.8.5.tgz#18626bcb2d38b2ee7feb48b9c36acea094190dd1"
-  integrity sha512-Mj8jmv4AS76OY+Hx/Xoyihj02SUZ2ELk+O5x89pODz1+NeGtSWHHjZjnSam9HYAjycvVI/lGJdk/7w0nWIV/yQ==
-  dependencies:
-    "@jimp/utils" "^0.8.5"
-    core-js "^2.5.7"
-    omggif "^1.0.9"
-
-"@jimp/jpeg@^0.8.5":
-  version "0.8.5"
-  resolved "https://registry.yarnpkg.com/@jimp/jpeg/-/jpeg-0.8.5.tgz#07b3524dadb2d69d0b7cd862d9525a6f42cdcc28"
-  integrity sha512-7kjTY0BiCpwRywk+oPfpLto7cLI+9G0mf4N1bv1Hn+VLQwcXFy2fHyl4qjqLbbY6u4cyZgqN+R8Pg6GRRzv0kw==
-  dependencies:
-    "@jimp/utils" "^0.8.5"
-    core-js "^2.5.7"
-    jpeg-js "^0.3.4"
-
-"@jimp/plugin-blit@^0.8.5":
-  version "0.8.5"
-  resolved "https://registry.yarnpkg.com/@jimp/plugin-blit/-/plugin-blit-0.8.5.tgz#5a865ca39e2bd46d7f7250a86e44c67115b84bcf"
-  integrity sha512-r8Z1CwazaJwZCRbucQgrfprlGyH91tX7GubUsbWr+zy5/dRJAAgaPj/hcoHDwbh3zyiXp5BECKKzKW0x4reL4w==
-  dependencies:
-    "@jimp/utils" "^0.8.5"
-    core-js "^2.5.7"
-
-"@jimp/plugin-blur@^0.8.5":
-  version "0.8.5"
-  resolved "https://registry.yarnpkg.com/@jimp/plugin-blur/-/plugin-blur-0.8.5.tgz#6a4675cdf50ed0add497af280b904858017b59b9"
-  integrity sha512-UH5ywpV4YooUh9HXEsrNKDtojLCvIAAV0gywqn8EQeFyzwBJyXAvRNARJp7zr5OPLr9uGXkRLDCO9YyzdlXZng==
-  dependencies:
-    "@jimp/utils" "^0.8.5"
-    core-js "^2.5.7"
-
-"@jimp/plugin-color@^0.8.5":
-  version "0.8.5"
-  resolved "https://registry.yarnpkg.com/@jimp/plugin-color/-/plugin-color-0.8.5.tgz#fd4a656fbf6bd9db9e86a6cd2e141d0bf2250a8b"
-  integrity sha512-7XHqcTQ8Y1zto1b9P1y8m1dzSjnOpBsD9OZG0beTpeJ5bgPX+hF5ZLmvcM6c5ljkINw5EUF1it07BYbkCxiGQA==
-  dependencies:
-    "@jimp/utils" "^0.8.5"
-    core-js "^2.5.7"
-    tinycolor2 "^1.4.1"
-
-"@jimp/plugin-contain@^0.8.5":
-  version "0.8.5"
-  resolved "https://registry.yarnpkg.com/@jimp/plugin-contain/-/plugin-contain-0.8.5.tgz#e2fd426684790972596c9035b4ddb8594d5be627"
-  integrity sha512-ZkiPFx9L0yITiKtYTYLWyBsSIdxo/NARhNPRZXyVF9HmTWSLDUw1c2c1uvETKxDZTAVK+souYT14DwFWWdhsYA==
-  dependencies:
-    "@jimp/utils" "^0.8.5"
-    core-js "^2.5.7"
-
-"@jimp/plugin-cover@^0.8.5":
-  version "0.8.5"
-  resolved "https://registry.yarnpkg.com/@jimp/plugin-cover/-/plugin-cover-0.8.5.tgz#25672884c5bf0bd6bbffbf288482f5f2cf53f50d"
-  integrity sha512-OdT4YAopLOhbhTUQV3R1v5ZZqIaUt3n3vJi/OfTbsak1t9UkPBVdmYPyhoont8zJdtdkF5dW16Ro1FTshytcww==
-  dependencies:
-    "@jimp/utils" "^0.8.5"
-    core-js "^2.5.7"
-
-"@jimp/plugin-crop@^0.8.5":
-  version "0.8.5"
-  resolved "https://registry.yarnpkg.com/@jimp/plugin-crop/-/plugin-crop-0.8.5.tgz#68e2a72796148d32b18fd74d5f0d2dc049b5af84"
-  integrity sha512-E1Hb+gfu2k74Gkqh96apAyVljsP5MjCH4TY6lECAAEcYKGH/XRhz6lY2dSEjCYE7KtiqjTZzWwYkgAvkwojj9Q==
-  dependencies:
-    "@jimp/utils" "^0.8.5"
-    core-js "^2.5.7"
-
-"@jimp/plugin-displace@^0.8.5":
-  version "0.8.5"
-  resolved "https://registry.yarnpkg.com/@jimp/plugin-displace/-/plugin-displace-0.8.5.tgz#af75a58939653c0b489ed57ea056fbde2cca5557"
-  integrity sha512-fVgVYTS1HZzAXkg8Lg06PuirSUG5oXYaYYGL+3ZU4tmZn1pyZ+mZyfejpwtymETEYZnmymHoCT4xto19E/IRvA==
-  dependencies:
-    "@jimp/utils" "^0.8.5"
-    core-js "^2.5.7"
-
-"@jimp/plugin-dither@^0.8.5":
-  version "0.8.5"
-  resolved "https://registry.yarnpkg.com/@jimp/plugin-dither/-/plugin-dither-0.8.5.tgz#66ce78be90071ddef5ac2451da97b2c28d836960"
-  integrity sha512-KSj2y8E3yK7tldjT/8ejqAWw5HFBjtWW6QkcxfW7FdV4c/nsXZXDkMbhqMZ7FkDuSYoAPeWUFeddrH4yipC5iA==
-  dependencies:
-    "@jimp/utils" "^0.8.5"
-    core-js "^2.5.7"
-
-"@jimp/plugin-flip@^0.8.5":
-  version "0.8.5"
-  resolved "https://registry.yarnpkg.com/@jimp/plugin-flip/-/plugin-flip-0.8.5.tgz#ef9bd0b7126bc6d696bd60f8591071461eef993c"
-  integrity sha512-2QbGDkurPNAXZUeHLo/UA3tjh+AbAXWZKSdtoa1ArlASovRz8rqtA45YIRIkKrMH82TA3PZk8bgP2jaLKLrzww==
-  dependencies:
-    "@jimp/utils" "^0.8.5"
-    core-js "^2.5.7"
-
-"@jimp/plugin-gaussian@^0.8.5":
-  version "0.8.5"
-  resolved "https://registry.yarnpkg.com/@jimp/plugin-gaussian/-/plugin-gaussian-0.8.5.tgz#2de042c20def796276e46e3a0a4d576ceeeb6ddb"
-  integrity sha512-2zReC5GJcVAXtf3UgzFcHSYN277i02K9Yrhc1xJf3mti00s43uD++B5Ho7/mIo+HrntVvWhxqar7PARdq0lVIg==
-  dependencies:
-    "@jimp/utils" "^0.8.5"
-    core-js "^2.5.7"
-
-"@jimp/plugin-invert@^0.8.5":
-  version "0.8.5"
-  resolved "https://registry.yarnpkg.com/@jimp/plugin-invert/-/plugin-invert-0.8.5.tgz#91044275df2101beecabd6d12416539724840f6a"
-  integrity sha512-GyMXPGheHdS14xfDceuZ9hrGm6gE9UG3PfTEjQbJmHMWippLC6yf8kombSudJlUf8q72YYSSXsSFKGgkHa67vA==
-  dependencies:
-    "@jimp/utils" "^0.8.5"
-    core-js "^2.5.7"
-
-"@jimp/plugin-mask@^0.8.5":
-  version "0.8.5"
-  resolved "https://registry.yarnpkg.com/@jimp/plugin-mask/-/plugin-mask-0.8.5.tgz#c7ce4961902c333f7a3adaa89e5d95204dc94193"
-  integrity sha512-inD/++XO+MkmwXl9JGYQ8X2deyOZuq9i+dmugH/557p16B9Q6tvUQt5X1Yg5w7hhkLZ00BKOAJI9XoyCC1NFvQ==
-  dependencies:
-    "@jimp/utils" "^0.8.5"
-    core-js "^2.5.7"
-
-"@jimp/plugin-normalize@^0.8.5":
-  version "0.8.5"
-  resolved "https://registry.yarnpkg.com/@jimp/plugin-normalize/-/plugin-normalize-0.8.5.tgz#4fe62178ae45ba987f638dde2da8230277318b19"
-  integrity sha512-8YRWJWBT4NoSAbPhnjQJXGeaeWVrJAlGDv39A54oNH8Ry47fHcE0EN6zogQNpBuM34M6hRnZl4rOv1FIisaWdg==
-  dependencies:
-    "@jimp/utils" "^0.8.5"
-    core-js "^2.5.7"
-
-"@jimp/plugin-print@^0.8.5":
-  version "0.8.5"
-  resolved "https://registry.yarnpkg.com/@jimp/plugin-print/-/plugin-print-0.8.5.tgz#702228f962bdfd53b38c17e49053e4124e8051c0"
-  integrity sha512-BviNpCiA/fEieOqsrWr1FkqyFuiG2izdyyg7zUqyeUTHPwqrTLvXO9cfP/ThG4hZpu5wMQ5QClWSqhZu1fAwxA==
-  dependencies:
-    "@jimp/utils" "^0.8.5"
-    core-js "^2.5.7"
-    load-bmfont "^1.4.0"
-
-"@jimp/plugin-resize@^0.8.5":
-  version "0.8.5"
-  resolved "https://registry.yarnpkg.com/@jimp/plugin-resize/-/plugin-resize-0.8.5.tgz#4949909d89a9e540725b7431abcbafd520ce32f4"
-  integrity sha512-gIdmISuNmZQ1QwprnRC5VXVWQfKIiWineVQGebpMAG/aoFOLDXrVl939Irg7Fb/uOlSFTzpAbt1zpJ8YG/Mi2w==
-  dependencies:
-    "@jimp/utils" "^0.8.5"
-    core-js "^2.5.7"
-
-"@jimp/plugin-rotate@^0.8.5":
-  version "0.8.5"
-  resolved "https://registry.yarnpkg.com/@jimp/plugin-rotate/-/plugin-rotate-0.8.5.tgz#279dbe2c5e51ec2b2861010cbcc38ce574b12f9c"
-  integrity sha512-8T9wnL3gb+Z0ogMZmtyI6h3y7TuqW2a5SpFbzFUVF+lTZoAabXjEfX3CAozizCLaT+Duc5H2FJVemAHiyr+Dbw==
-  dependencies:
-    "@jimp/utils" "^0.8.5"
-    core-js "^2.5.7"
-
-"@jimp/plugin-scale@^0.8.5":
-  version "0.8.5"
-  resolved "https://registry.yarnpkg.com/@jimp/plugin-scale/-/plugin-scale-0.8.5.tgz#6c166575c085da31788acda7da460af3a60351b3"
-  integrity sha512-G+CDH9s7BsxJ4b+mKZ5SsiXwTAynBJ+7/9SwZFnICZJJvLd79Tws6VPXfSaKJZuWnGIX++L8jTGmFORCfLNkdg==
-  dependencies:
-    "@jimp/utils" "^0.8.5"
-    core-js "^2.5.7"
-
-"@jimp/plugins@^0.8.5":
-  version "0.8.5"
-  resolved "https://registry.yarnpkg.com/@jimp/plugins/-/plugins-0.8.5.tgz#1d8d6521e67c527885833ffd5fab7d707ebce3c4"
-  integrity sha512-52na0wqfQ3uItIA+C9cJ1EXffhSmABgK7ETClDseUh9oGtynHzxZ97smnFf1ydLjXLrF89Gt+YBxWLyiBGgiZQ==
-  dependencies:
-    "@jimp/plugin-blit" "^0.8.5"
-    "@jimp/plugin-blur" "^0.8.5"
-    "@jimp/plugin-color" "^0.8.5"
-    "@jimp/plugin-contain" "^0.8.5"
-    "@jimp/plugin-cover" "^0.8.5"
-    "@jimp/plugin-crop" "^0.8.5"
-    "@jimp/plugin-displace" "^0.8.5"
-    "@jimp/plugin-dither" "^0.8.5"
-    "@jimp/plugin-flip" "^0.8.5"
-    "@jimp/plugin-gaussian" "^0.8.5"
-    "@jimp/plugin-invert" "^0.8.5"
-    "@jimp/plugin-mask" "^0.8.5"
-    "@jimp/plugin-normalize" "^0.8.5"
-    "@jimp/plugin-print" "^0.8.5"
-    "@jimp/plugin-resize" "^0.8.5"
-    "@jimp/plugin-rotate" "^0.8.5"
-    "@jimp/plugin-scale" "^0.8.5"
-    core-js "^2.5.7"
-    timm "^1.6.1"
-
-"@jimp/png@^0.8.5":
-  version "0.8.5"
-  resolved "https://registry.yarnpkg.com/@jimp/png/-/png-0.8.5.tgz#121debfb55c5ba2a44e9ffeeb901bbb97fd24f53"
-  integrity sha512-zT89ucu8I2rsD3FIMIPLgr1OyKn4neD+5umwD3MY8AOB8+6tX5bFtnmTm3FzGJaJuibkK0wFl87eiaxnb+Megw==
-  dependencies:
-    "@jimp/utils" "^0.8.5"
-    core-js "^2.5.7"
-    pngjs "^3.3.3"
-
-"@jimp/tiff@^0.8.5":
-  version "0.8.5"
-  resolved "https://registry.yarnpkg.com/@jimp/tiff/-/tiff-0.8.5.tgz#b1eddfd8b7fd3171cbde8fbe133c36a9889b04c2"
-  integrity sha512-Z7uzDcbHuwDg+hy2+UJQ2s5O6sqYXmv6H1fmSf/2dxBrlGMzl8yTc2/BxLrGREeoidDDMcKmXYGAOp4uCsdJjw==
-  dependencies:
-    core-js "^2.5.7"
-    utif "^2.0.1"
-
-"@jimp/types@^0.8.5":
-  version "0.8.5"
-  resolved "https://registry.yarnpkg.com/@jimp/types/-/types-0.8.5.tgz#49058260cfe4227da39f4915c5e5c83b0dbcbf46"
-  integrity sha512-XUvpyebZGd1vyFiJyxUT4H9A3mKD7MV2MxjXnay3fNTrcow0UJJspmFw/w+G3TP/1dgrVC4K++gntjR6QWTzvg==
-  dependencies:
-    "@jimp/bmp" "^0.8.5"
-    "@jimp/gif" "^0.8.5"
-    "@jimp/jpeg" "^0.8.5"
-    "@jimp/png" "^0.8.5"
-    "@jimp/tiff" "^0.8.5"
-    core-js "^2.5.7"
-    timm "^1.6.1"
-
-"@jimp/utils@^0.8.5":
-  version "0.8.5"
-  resolved "https://registry.yarnpkg.com/@jimp/utils/-/utils-0.8.5.tgz#5aede22f51b56141d245bef1195013a1de9158bd"
-  integrity sha512-D3+H4BiopDkhUKvKkZTPPJ53voqOkfMuk3r7YZNcLtXGLkchjjukC4056lNo7B0DzjBgowTYsQM3JjKnYNIYeg==
-  dependencies:
-    core-js "^2.5.7"
-
 "@types/babel__core@^7.1.0":
   version "7.1.2"
   resolved "https://registry.yarnpkg.com/@types/babel__core/-/babel__core-7.1.2.tgz#608c74f55928033fce18b99b213c16be4b3d114f"
@@ -615,28 +363,30 @@
     "@types/istanbul-lib-coverage" "*"
     "@types/istanbul-lib-report" "*"
 
-"@types/jest-diff@*":
-  version "20.0.1"
-  resolved "https://registry.yarnpkg.com/@types/jest-diff/-/jest-diff-20.0.1.tgz#35cc15b9c4f30a18ef21852e255fdb02f6d59b89"
-  integrity sha512-yALhelO3i0hqZwhjtcr6dYyaLoCHbAMshwtj6cGxTvHZAKXHsYGdff6E8EPw3xLKY0ELUTQ69Q1rQiJENnccMA==
-
-"@types/jest@^24.0.22":
-  version "24.0.22"
-  resolved "https://registry.yarnpkg.com/@types/jest/-/jest-24.0.22.tgz#08a50be08e78aba850a1185626e71d31e2336145"
-  integrity sha512-t2OvhNZnrNjlzi2i0/cxbLVM59WN15I2r1Qtb7wDv28PnV9IzrPtagFRey/S9ezdLD0zyh1XGMQIEQND2YEfrw==
+"@types/jest@^24.0.23":
+  version "24.0.23"
+  resolved "https://registry.yarnpkg.com/@types/jest/-/jest-24.0.23.tgz#046f8e2ade026fe831623e361a36b6fb9a4463e4"
+  integrity sha512-L7MBvwfNpe7yVPTXLn32df/EK+AMBFAFvZrRuArGs7npEWnlziUXK+5GMIUTI4NIuwok3XibsjXCs5HxviYXjg==
   dependencies:
-    "@types/jest-diff" "*"
+    jest-diff "^24.3.0"
 
 "@types/json-schema@^7.0.3":
   version "7.0.3"
   resolved "https://registry.yarnpkg.com/@types/json-schema/-/json-schema-7.0.3.tgz#bdfd69d61e464dcc81b25159c270d75a73c1a636"
   integrity sha512-Il2DtDVRGDcqjDtE+rF8iqg1CArehSK84HZJCT7AMITlyXRBpuPhqGLDQMowraqqu1coEaimg4ZOqggt6L6L+A==
 
-"@types/node@^12.12.7":
+"@types/node@*", "@types/node@^12.12.7":
   version "12.12.7"
   resolved "https://registry.yarnpkg.com/@types/node/-/node-12.12.7.tgz#01e4ea724d9e3bd50d90c11fd5980ba317d8fa11"
   integrity sha512-E6Zn0rffhgd130zbCbAr/JdXfXkoOUFAKNs/rF8qnafSJ8KYaA/j3oz7dcwal+lYjLA7xvdd5J4wdYpCTlP8+w==
 
+"@types/pngjs@^3.4.0":
+  version "3.4.0"
+  resolved "https://registry.yarnpkg.com/@types/pngjs/-/pngjs-3.4.0.tgz#8d2c330df29db9135211bfb9a988fb121ec30dc3"
+  integrity sha512-4mPTo6YsNeAzhJ3X8okGv8467YDFKqMNXEuJH/xJBGdnzS2HUWIY3P/iGtYe6xlnZj85rqJhs4l9rQNpn58VNA==
+  dependencies:
+    "@types/node" "*"
+
 "@types/stack-utils@^1.0.1":
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/@types/stack-utils/-/stack-utils-1.0.1.tgz#0a851d3bd96498fa25c33ab7278ed3bd65f06c3e"
@@ -654,40 +404,40 @@
   dependencies:
     "@types/yargs-parser" "*"
 
-"@typescript-eslint/eslint-plugin@^2.6.1":
-  version "2.6.1"
-  resolved "https://registry.yarnpkg.com/@typescript-eslint/eslint-plugin/-/eslint-plugin-2.6.1.tgz#e34972a24f8aba0861f9ccf7130acd74fd11e079"
-  integrity sha512-Z0rddsGqioKbvqfohg7BwkFC3PuNLsB+GE9QkFza7tiDzuHoy0y823Y+oGNDzxNZrYyLjqkZtCTl4vCqOmEN4g==
+"@typescript-eslint/eslint-plugin@^2.7.0":
+  version "2.7.0"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/eslint-plugin/-/eslint-plugin-2.7.0.tgz#dff176bdb73dfd7e2e43062452189bd1b9db6021"
+  integrity sha512-H5G7yi0b0FgmqaEUpzyBlVh0d9lq4cWG2ap0RKa6BkF3rpBb6IrAoubt1NWh9R2kRs/f0k6XwRDiDz3X/FqXhQ==
   dependencies:
-    "@typescript-eslint/experimental-utils" "2.6.1"
+    "@typescript-eslint/experimental-utils" "2.7.0"
     eslint-utils "^1.4.2"
     functional-red-black-tree "^1.0.1"
     regexpp "^2.0.1"
     tsutils "^3.17.1"
 
-"@typescript-eslint/experimental-utils@2.6.1":
-  version "2.6.1"
-  resolved "https://registry.yarnpkg.com/@typescript-eslint/experimental-utils/-/experimental-utils-2.6.1.tgz#eddaca17a399ebf93a8628923233b4f93793acfd"
-  integrity sha512-EVrrUhl5yBt7fC7c62lWmriq4MIc49zpN3JmrKqfiFXPXCM5ErfEcZYfKOhZXkW6MBjFcJ5kGZqu1b+lyyExUw==
+"@typescript-eslint/experimental-utils@2.7.0":
+  version "2.7.0"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/experimental-utils/-/experimental-utils-2.7.0.tgz#58d790a3884df3041b5a5e08f9e5e6b7c41864b5"
+  integrity sha512-9/L/OJh2a5G2ltgBWJpHRfGnt61AgDeH6rsdg59BH0naQseSwR7abwHq3D5/op0KYD/zFT4LS5gGvWcMmegTEg==
   dependencies:
     "@types/json-schema" "^7.0.3"
-    "@typescript-eslint/typescript-estree" "2.6.1"
+    "@typescript-eslint/typescript-estree" "2.7.0"
     eslint-scope "^5.0.0"
 
-"@typescript-eslint/parser@^2.6.1":
-  version "2.6.1"
-  resolved "https://registry.yarnpkg.com/@typescript-eslint/parser/-/parser-2.6.1.tgz#3c00116baa0d696bc334ca18ac5286b34793993c"
-  integrity sha512-PDPkUkZ4c7yA+FWqigjwf3ngPUgoLaGjMlFh6TRtbjhqxFBnkElDfckSjm98q9cMr4xRzZ15VrS/xKm6QHYf0w==
+"@typescript-eslint/parser@^2.7.0":
+  version "2.7.0"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/parser/-/parser-2.7.0.tgz#b5e6a4944e2b68dba1e7fbfd5242e09ff552fd12"
+  integrity sha512-ctC0g0ZvYclxMh/xI+tyqP0EC2fAo6KicN9Wm2EIao+8OppLfxji7KAGJosQHSGBj3TcqUrA96AjgXuKa5ob2g==
   dependencies:
     "@types/eslint-visitor-keys" "^1.0.0"
-    "@typescript-eslint/experimental-utils" "2.6.1"
-    "@typescript-eslint/typescript-estree" "2.6.1"
+    "@typescript-eslint/experimental-utils" "2.7.0"
+    "@typescript-eslint/typescript-estree" "2.7.0"
     eslint-visitor-keys "^1.1.0"
 
-"@typescript-eslint/typescript-estree@2.6.1":
-  version "2.6.1"
-  resolved "https://registry.yarnpkg.com/@typescript-eslint/typescript-estree/-/typescript-estree-2.6.1.tgz#fb363dd4ca23384745c5ea4b7f4c867432b00d31"
-  integrity sha512-+sTnssW6bcbDZKE8Ce7VV6LdzkQz2Bxk7jzk1J8H1rovoTxnm6iXvYIyncvNsaB/kBCOM63j/LNJfm27bNdUoA==
+"@typescript-eslint/typescript-estree@2.7.0":
+  version "2.7.0"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/typescript-estree/-/typescript-estree-2.7.0.tgz#34fd98c77a07b40d04d5b4203eddd3abeab909f4"
+  integrity sha512-vVCE/DY72N4RiJ/2f10PTyYekX2OLaltuSIBqeHYI44GQ940VCYioInIb8jKMrK9u855OEJdFC+HmWAZTnC+Ag==
   dependencies:
     debug "^4.1.1"
     glob "^7.1.4"
@@ -783,11 +533,6 @@ ansi-styles@^3.2.0, ansi-styles@^3.2.1:
   dependencies:
     color-convert "^1.9.0"
 
-any-base@^1.1.0:
-  version "1.1.0"
-  resolved "https://registry.yarnpkg.com/any-base/-/any-base-1.1.0.tgz#ae101a62bc08a597b4c9ab5b7089d456630549fe"
-  integrity sha512-uMgjozySS8adZZYePpaWs8cxB9/kdzmpX6SgJZ+wbz1K5eYk5QMYDVJaZKhxyIHUdnnJkfR7SVgStgH7LkGUyg==
-
 anymatch@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/anymatch/-/anymatch-2.0.0.tgz#bcb24b4f37934d9aa7ac17b4adaf89e7c76ef2eb"
@@ -931,11 +676,6 @@ balanced-match@^1.0.0:
   resolved "https://registry.yarnpkg.com/balanced-match/-/balanced-match-1.0.0.tgz#89b4d199ab2bee49de164ea02b89ce462d71b767"
   integrity sha1-ibTRmasr7kneFk6gK4nORi1xt2c=
 
-base64-js@^1.0.2:
-  version "1.3.0"
-  resolved "https://registry.yarnpkg.com/base64-js/-/base64-js-1.3.0.tgz#cab1e6118f051095e58b5281aea8c1cd22bfc0e3"
-  integrity sha512-ccav/yGvoa80BQDljCxsmmQ3Xvx60/UpBIij5QN21W3wBi/hhIC9OoO+KLpu9IJTS9j4DRVJ3aDDF9cMSoa2lw==
-
 base@^0.11.1:
   version "0.11.2"
   resolved "https://registry.yarnpkg.com/base/-/base-0.11.2.tgz#7bde5ced145b6d551a90db87f83c558b4eb48a8f"
@@ -956,11 +696,6 @@ bcrypt-pbkdf@^1.0.0:
   dependencies:
     tweetnacl "^0.14.3"
 
-bmp-js@^0.1.0:
-  version "0.1.0"
-  resolved "https://registry.yarnpkg.com/bmp-js/-/bmp-js-0.1.0.tgz#e05a63f796a6c1ff25f4771ec7adadc148c07233"
-  integrity sha1-4Fpj95amwf8l9Hcex62twUjAcjM=
-
 brace-expansion@^1.1.7:
   version "1.1.11"
   resolved "https://registry.yarnpkg.com/brace-expansion/-/brace-expansion-1.1.11.tgz#3c7fcbf529d87226f3d2f52b966ff5271eb441dd"
@@ -1011,24 +746,11 @@ bser@^2.0.0:
   dependencies:
     node-int64 "^0.4.0"
 
-buffer-equal@0.0.1:
-  version "0.0.1"
-  resolved "https://registry.yarnpkg.com/buffer-equal/-/buffer-equal-0.0.1.tgz#91bc74b11ea405bc916bc6aa908faafa5b4aac4b"
-  integrity sha1-kbx0sR6kBbyRa8aqkI+q+ltKrEs=
-
 buffer-from@1.x, buffer-from@^1.0.0:
   version "1.1.1"
   resolved "https://registry.yarnpkg.com/buffer-from/-/buffer-from-1.1.1.tgz#32713bc028f75c02fdb710d7c7bcec1f2c6070ef"
   integrity sha512-MQcXEUbCKtEo7bhqEs6560Hyd4XaovZlO/k9V3hjVUF/zwW7KBVdSK4gIt/bzwS9MbR5qob+F5jusZsb0YQK2A==
 
-buffer@^5.2.0:
-  version "5.2.1"
-  resolved "https://registry.yarnpkg.com/buffer/-/buffer-5.2.1.tgz#dd57fa0f109ac59c602479044dca7b8b3d0b71d6"
-  integrity sha512-c+Ko0loDaFfuPWiL02ls9Xd3GO3cPVmUobQ6t3rXNUk304u6hGq+8N/kFi+QEIKhzK3uwolVhLzszmfLmMLnqg==
-  dependencies:
-    base64-js "^1.0.2"
-    ieee754 "^1.1.4"
-
 cache-base@^1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/cache-base/-/cache-base-1.0.1.tgz#0a7f46416831c8b662ee36fe4e7c59d76f666ab2"
@@ -1195,11 +917,6 @@ copy-descriptor@^0.1.0:
   resolved "https://registry.yarnpkg.com/copy-descriptor/-/copy-descriptor-0.1.1.tgz#676f6eb3c39997c2ee1ac3a924fd6124748f578d"
   integrity sha1-Z29us8OZl8LuGsOpJP1hJHSPV40=
 
-core-js@^2.5.7:
-  version "2.6.9"
-  resolved "https://registry.yarnpkg.com/core-js/-/core-js-2.6.9.tgz#6b4b214620c834152e179323727fc19741b084f2"
-  integrity sha512-HOpZf6eXmnl7la+cUdMnLvUxKNqLUzJvgIziQ0DiF3JwSImNphIqdGqzj6hIKyX04MmV0poclQ7+wjWvxQyR2A==
-
 core-util-is@1.0.2, core-util-is@~1.0.0:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/core-util-is/-/core-util-is-1.0.2.tgz#b5fd54220aa2bc5ab57aab7140c940754503c1a7"
@@ -1285,7 +1002,7 @@ deep-is@~0.1.3:
   resolved "https://registry.yarnpkg.com/deep-is/-/deep-is-0.1.3.tgz#b369d6fb5dbc13eecf524f91b070feedc357cf34"
   integrity sha1-s2nW+128E+7PUk+RsHD+7cNXzzQ=
 
-define-properties@^1.1.2, define-properties@^1.1.3:
+define-properties@^1.1.2:
   version "1.1.3"
   resolved "https://registry.yarnpkg.com/define-properties/-/define-properties-1.1.3.tgz#cf88da6cbee26fe6db7094f61d870cbd84cee9f1"
   integrity sha512-3MqfYKj2lLzdMSf8ZIZE/V+Zuy+BgD6f164e8K2w7dgnpKArBDerGYpM46IYYcjnkdPNMjPk9A6VFB8+3SKlXQ==
@@ -1346,11 +1063,6 @@ doctrine@^3.0.0:
   dependencies:
     esutils "^2.0.2"
 
-dom-walk@^0.1.0:
-  version "0.1.1"
-  resolved "https://registry.yarnpkg.com/dom-walk/-/dom-walk-0.1.1.tgz#672226dc74c8f799ad35307df936aba11acd6018"
-  integrity sha1-ZyIm3HTI95mtNTB9+TaroRrNYBg=
-
 domexception@^1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/domexception/-/domexception-1.0.1.tgz#937442644ca6a31261ef36e3ec677fe805582c90"
@@ -1390,7 +1102,7 @@ error-ex@^1.3.1:
   dependencies:
     is-arrayish "^0.2.1"
 
-es-abstract@^1.13.0, es-abstract@^1.5.1:
+es-abstract@^1.5.1:
   version "1.13.0"
   resolved "https://registry.yarnpkg.com/es-abstract/-/es-abstract-1.13.0.tgz#ac86145fdd5099d8dd49558ccba2eaf9b88e24e9"
   integrity sha512-vDZfg/ykNxQVwup/8E1BZhVzFfBxs9NqMzGcvIJrqg5k2/5Za2bWo40dK2J1pgLngZ7c+Shh8lwYtLGyrwPutg==
@@ -1566,11 +1278,6 @@ execa@^1.0.0:
     signal-exit "^3.0.0"
     strip-eof "^1.0.0"
 
-exif-parser@^0.1.12:
-  version "0.1.12"
-  resolved "https://registry.yarnpkg.com/exif-parser/-/exif-parser-0.1.12.tgz#58a9d2d72c02c1f6f02a0ef4a9166272b7760922"
-  integrity sha1-WKnS1ywCwfbwKg70qRZicrd2CSI=
-
 exit@^0.1.2:
   version "0.1.2"
   resolved "https://registry.yarnpkg.com/exit/-/exit-0.1.2.tgz#0632638f8d877cc82107d30a0fff1a17cba1cd0c"
@@ -1695,11 +1402,6 @@ file-entry-cache@^5.0.1:
   dependencies:
     flat-cache "^2.0.1"
 
-file-type@^9.0.0:
-  version "9.0.0"
-  resolved "https://registry.yarnpkg.com/file-type/-/file-type-9.0.0.tgz#a68d5ad07f486414dfb2c8866f73161946714a18"
-  integrity sha512-Qe/5NJrgIOlwijpq3B7BEpzPFcgzggOTagZmkXQY4LA6bsXKTUstK7Wp12lEJ/mLKTpvIZxmIuRcLYWT6ov9lw==
-
 fill-range@^4.0.0:
   version "4.0.0"
   resolved "https://registry.yarnpkg.com/fill-range/-/fill-range-4.0.0.tgz#d544811d428f98eb06a63dc402d2403c328c38f7"
@@ -1731,13 +1433,6 @@ flatted@^2.0.0:
   resolved "https://registry.yarnpkg.com/flatted/-/flatted-2.0.1.tgz#69e57caa8f0eacbc281d2e2cb458d46fdb449e08"
   integrity sha512-a1hQMktqW9Nmqr5aktAux3JMNqaucxGcjtjWnZLHX7yyPCmlSV3M54nGYbqT8K+0GhF3NBgmJCc3ma+WOgX8Jg==
 
-for-each@^0.3.3:
-  version "0.3.3"
-  resolved "https://registry.yarnpkg.com/for-each/-/for-each-0.3.3.tgz#69b447e88a0a5d32c3e7084f3f1710034b21376e"
-  integrity sha512-jqYfLp7mo9vIyQf8ykW2v7A+2N4QjeCeI5+Dz9XraiO1ign81wjiH7Fb9vSOWvQfNtmSa4H2RoQTrrXivdUZmw==
-  dependencies:
-    is-callable "^1.1.3"
-
 for-in@^1.0.2:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/for-in/-/for-in-1.0.2.tgz#81068d295a8142ec0ac726c6e2200c30fb6d5e80"
@@ -1868,14 +1563,6 @@ glob@^7.1.4:
     once "^1.3.0"
     path-is-absolute "^1.0.0"
 
-global@~4.3.0:
-  version "4.3.2"
-  resolved "https://registry.yarnpkg.com/global/-/global-4.3.2.tgz#e76989268a6c74c38908b1305b10fc0e394e9d0f"
-  integrity sha1-52mJJopsdMOJCLEwWxD8DjlOnQ8=
-  dependencies:
-    min-document "^2.19.0"
-    process "~0.5.1"
-
 globals@^11.1.0, globals@^11.7.0:
   version "11.12.0"
   resolved "https://registry.yarnpkg.com/globals/-/globals-11.12.0.tgz#ab8795338868a0babd8525758018c2a7eb95c42e"
@@ -1996,11 +1683,6 @@ iconv-lite@0.4.24, iconv-lite@^0.4.24, iconv-lite@^0.4.4:
   dependencies:
     safer-buffer ">= 2.1.2 < 3"
 
-ieee754@^1.1.4:
-  version "1.1.13"
-  resolved "https://registry.yarnpkg.com/ieee754/-/ieee754-1.1.13.tgz#ec168558e95aa181fd87d37f55c32bbcb6708b84"
-  integrity sha512-4vf7I2LYV/HaWerSo3XmlMkp5eZ83i+/CDluXi/IGTs/O1sejBNhTtnxzmRZfvOUqj7lZjqHkeTvpgSFDlWZTg==
-
 ignore-walk@^3.0.1:
   version "3.0.1"
   resolved "https://registry.yarnpkg.com/ignore-walk/-/ignore-walk-3.0.1.tgz#a83e62e7d272ac0e3b551aaa82831a19b69f82f8"
@@ -2102,7 +1784,7 @@ is-buffer@^1.1.5:
   resolved "https://registry.yarnpkg.com/is-buffer/-/is-buffer-1.1.6.tgz#efaa2ea9daa0d7ab2ea13a97b2b8ad51fefbe8be"
   integrity sha512-NcdALwpXkTm5Zvvbk7owOUSvVvBKDgKP5/ewfXEznmQFfs4ZRmanOeKBTjRVjka3QFoN6XJ+9F3USqfHqTaU5w==
 
-is-callable@^1.1.3, is-callable@^1.1.4:
+is-callable@^1.1.4:
   version "1.1.4"
   resolved "https://registry.yarnpkg.com/is-callable/-/is-callable-1.1.4.tgz#1e1adf219e1eeb684d691f9d6a05ff0d30a24d75"
   integrity sha512-r5p9sxJjYnArLjObpjA4xu5EKI3CuKHkJXMhT7kwbpUyIFD1n5PMAsoPvWnvtZiNz7LjkYDRZhd7FlI0eMijEA==
@@ -2185,11 +1867,6 @@ is-fullwidth-code-point@^3.0.0:
   resolved "https://registry.yarnpkg.com/is-fullwidth-code-point/-/is-fullwidth-code-point-3.0.0.tgz#f116f8064fe90b3f7844a38997c0b75051269f1d"
   integrity sha512-zymm5+u+sCsSWyD9qNaejV3DFvhCKclKdizYaJUuHA83RLjb7nSuGnddCHGv0hk+KY7BMAlsWeK4Ueg6EV6XQg==
 
-is-function@^1.0.1:
-  version "1.0.1"
-  resolved "https://registry.yarnpkg.com/is-function/-/is-function-1.0.1.tgz#12cfb98b65b57dd3d193a3121f5f6e2f437602b5"
-  integrity sha1-Es+5i2W1fdPRk6MSH19uL0N2ArU=
-
 is-generator-fn@^2.0.0:
   version "2.1.0"
   resolved "https://registry.yarnpkg.com/is-generator-fn/-/is-generator-fn-2.1.0.tgz#7d140adc389aaf3011a8f2a2a4cfa6faadffb118"
@@ -2378,7 +2055,7 @@ jest-config@^24.9.0:
     pretty-format "^24.9.0"
     realpath-native "^1.1.0"
 
-jest-diff@^24.9.0:
+jest-diff@^24.3.0, jest-diff@^24.9.0:
   version "24.9.0"
   resolved "https://registry.yarnpkg.com/jest-diff/-/jest-diff-24.9.0.tgz#931b7d0d5778a1baf7452cb816e325e3724055da"
   integrity sha512-qMfrTs8AdJE2iqrTp0hzh7kTd2PQWrsFyj9tORoKmu32xjPjeE4NyjVRDz8ybYwqS2ik8N4hsIpiVTyFeo2lBQ==
@@ -2694,22 +2371,6 @@ jest@^24.9.0:
     import-local "^2.0.0"
     jest-cli "^24.9.0"
 
-jimp@^0.8.5:
-  version "0.8.5"
-  resolved "https://registry.yarnpkg.com/jimp/-/jimp-0.8.5.tgz#59427688ccc8d7a89c2165fd10d0e4164f041a9d"
-  integrity sha512-BW7t/+TCgKpqZw/wHFwqF/A/Tyk43RmzRHyMBdqfOepqunUrajt0RTqowdWyFo4CS2FmD8pFiYfefWjpXFWrCA==
-  dependencies:
-    "@jimp/custom" "^0.8.5"
-    "@jimp/plugins" "^0.8.5"
-    "@jimp/types" "^0.8.5"
-    core-js "^2.5.7"
-    regenerator-runtime "^0.13.3"
-
-jpeg-js@^0.3.4:
-  version "0.3.5"
-  resolved "https://registry.yarnpkg.com/jpeg-js/-/jpeg-js-0.3.5.tgz#6fbd6cd0e49627c5a0341796c9e50c70a2aa3673"
-  integrity sha512-hvaExqwmQDS8O9qnZAVDXGWU43Tbu1V0wMZmjROjT11jloSgGICZpscG+P6Nyi1BVAvyu2ARRx8qmEW30sxgdQ==
-
 "js-tokens@^3.0.0 || ^4.0.0", js-tokens@^4.0.0:
   version "4.0.0"
   resolved "https://registry.yarnpkg.com/js-tokens/-/js-tokens-4.0.0.tgz#19203fb59991df98e3a287050d4647cdeaf32499"
@@ -2861,20 +2522,6 @@ levn@^0.3.0, levn@~0.3.0:
     prelude-ls "~1.1.2"
     type-check "~0.3.2"
 
-load-bmfont@^1.3.1, load-bmfont@^1.4.0:
-  version "1.4.0"
-  resolved "https://registry.yarnpkg.com/load-bmfont/-/load-bmfont-1.4.0.tgz#75f17070b14a8c785fe7f5bee2e6fd4f98093b6b"
-  integrity sha512-kT63aTAlNhZARowaNYcY29Fn/QYkc52M3l6V1ifRcPewg2lvUZDAj7R6dXjOL9D0sict76op3T5+odumDSF81g==
-  dependencies:
-    buffer-equal "0.0.1"
-    mime "^1.3.4"
-    parse-bmfont-ascii "^1.0.3"
-    parse-bmfont-binary "^1.0.5"
-    parse-bmfont-xml "^1.1.4"
-    phin "^2.9.1"
-    xhr "^2.0.1"
-    xtend "^4.0.0"
-
 load-json-file@^4.0.0:
   version "4.0.0"
   resolved "https://registry.yarnpkg.com/load-json-file/-/load-json-file-4.0.0.tgz#2f5f45ab91e33216234fd53adab668eb4ec0993b"
@@ -2995,23 +2642,11 @@ mime-types@^2.1.12, mime-types@~2.1.19:
   dependencies:
     mime-db "1.40.0"
 
-mime@^1.3.4:
-  version "1.6.0"
-  resolved "https://registry.yarnpkg.com/mime/-/mime-1.6.0.tgz#32cd9e5c64553bd58d19a568af452acff04981b1"
-  integrity sha512-x0Vn8spI+wuJ1O6S7gnbaQg8Pxh4NNHb7KSINmEWKiPE4RKOplvijn+NkmYmmRgP68mc70j2EbeTFRsrswaQeg==
-
 mimic-fn@^2.1.0:
   version "2.1.0"
   resolved "https://registry.yarnpkg.com/mimic-fn/-/mimic-fn-2.1.0.tgz#7ed2c2ccccaf84d3ffcb7a69b57711fc2083401b"
   integrity sha512-OqbOk5oEQeAZ8WXWydlu9HJjz9WVdEIvamMCcXmuqUYjTknH/sqsWvhQ3vgwKFRR1HpjvNBKQ37nbJgYzGqGcg==
 
-min-document@^2.19.0:
-  version "2.19.0"
-  resolved "https://registry.yarnpkg.com/min-document/-/min-document-2.19.0.tgz#7bd282e3f5842ed295bb748cdd9f1ffa2c824685"
-  integrity sha1-e9KC4/WELtKVu3SM3Z8f+iyCRoU=
-  dependencies:
-    dom-walk "^0.1.0"
-
 minimatch@^3.0.4:
   version "3.0.4"
   resolved "https://registry.yarnpkg.com/minimatch/-/minimatch-3.0.4.tgz#5166e286457f03306064be5497e8dbb0c3d32083"
@@ -3057,7 +2692,7 @@ mixin-deep@^1.2.0:
     for-in "^1.0.2"
     is-extendable "^1.0.1"
 
-mkdirp@0.5.1, mkdirp@0.x, mkdirp@^0.5.0, mkdirp@^0.5.1:
+mkdirp@0.x, mkdirp@^0.5.0, mkdirp@^0.5.1:
   version "0.5.1"
   resolved "https://registry.yarnpkg.com/mkdirp/-/mkdirp-0.5.1.tgz#30057438eac6cf7f8c4767f38648d6697d75c903"
   integrity sha1-MAV0OOrGz3+MR2fzhkjWaX11yQM=
@@ -3273,11 +2908,6 @@ object.pick@^1.3.0:
   dependencies:
     isobject "^3.0.1"
 
-omggif@^1.0.9:
-  version "1.0.10"
-  resolved "https://registry.yarnpkg.com/omggif/-/omggif-1.0.10.tgz#ddaaf90d4a42f532e9e7cb3a95ecdd47f17c7b19"
-  integrity sha512-LMJTtvgc/nugXj0Vcrrs68Mn2D1r0zf630VNtqtpI1FEO7e+O9FP4gqs9AcnBaSEeoHIPm28u6qgPR0oyEpGSw==
-
 once@^1.3.0, once@^1.3.1, once@^1.4.0:
   version "1.4.0"
   resolved "https://registry.yarnpkg.com/once/-/once-1.4.0.tgz#583b1aa775961d4b113ac17d9c50baef9dd76bd1"
@@ -3366,11 +2996,6 @@ p-try@^2.0.0:
   resolved "https://registry.yarnpkg.com/p-try/-/p-try-2.2.0.tgz#cb2868540e313d61de58fafbe35ce9004d5540e6"
   integrity sha512-R4nPAVTAU0B9D35/Gk3uJf/7XYbQcyohSKdvAxIRSNghFl4e71hVoGnBNQz9cWaXxO2I10KTC+3jMdvvoKw6dQ==
 
-pako@^1.0.5:
-  version "1.0.10"
-  resolved "https://registry.yarnpkg.com/pako/-/pako-1.0.10.tgz#4328badb5086a426aa90f541977d4955da5c9732"
-  integrity sha512-0DTvPVU3ed8+HNXOu5Bs+o//Mbdj9VNQMUOe9oKCwh8l0GNwpTDMKCWbRjgtD291AWnkAgkqA/LOnQS8AmS1tw==
-
 parent-module@^1.0.0:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/parent-module/-/parent-module-1.0.1.tgz#691d2709e78c79fae3a156622452d00762caaaa2"
@@ -3378,32 +3003,6 @@ parent-module@^1.0.0:
   dependencies:
     callsites "^3.0.0"
 
-parse-bmfont-ascii@^1.0.3:
-  version "1.0.6"
-  resolved "https://registry.yarnpkg.com/parse-bmfont-ascii/-/parse-bmfont-ascii-1.0.6.tgz#11ac3c3ff58f7c2020ab22769079108d4dfa0285"
-  integrity sha1-Eaw8P/WPfCAgqyJ2kHkQjU36AoU=
-
-parse-bmfont-binary@^1.0.5:
-  version "1.0.6"
-  resolved "https://registry.yarnpkg.com/parse-bmfont-binary/-/parse-bmfont-binary-1.0.6.tgz#d038b476d3e9dd9db1e11a0b0e53a22792b69006"
-  integrity sha1-0Di0dtPp3Z2x4RoLDlOiJ5K2kAY=
-
-parse-bmfont-xml@^1.1.4:
-  version "1.1.4"
-  resolved "https://registry.yarnpkg.com/parse-bmfont-xml/-/parse-bmfont-xml-1.1.4.tgz#015319797e3e12f9e739c4d513872cd2fa35f389"
-  integrity sha512-bjnliEOmGv3y1aMEfREMBJ9tfL3WR0i0CKPj61DnSLaoxWR3nLrsQrEbCId/8rF4NyRF0cCqisSVXyQYWM+mCQ==
-  dependencies:
-    xml-parse-from-string "^1.0.0"
-    xml2js "^0.4.5"
-
-parse-headers@^2.0.0:
-  version "2.0.2"
-  resolved "https://registry.yarnpkg.com/parse-headers/-/parse-headers-2.0.2.tgz#9545e8a4c1ae5eaea7d24992bca890281ed26e34"
-  integrity sha512-/LypJhzFmyBIDYP9aDVgeyEb5sQfbfY5mnDq4hVhlQ69js87wXfmEI5V3xI6vvXasqebp0oCytYFLxsBVfCzSg==
-  dependencies:
-    for-each "^0.3.3"
-    string.prototype.trim "^1.1.2"
-
 parse-json@^4.0.0:
   version "4.0.0"
   resolved "https://registry.yarnpkg.com/parse-json/-/parse-json-4.0.0.tgz#be35f5425be1f7f6c747184f98a788cb99477ee0"
@@ -3454,11 +3053,6 @@ performance-now@^2.1.0:
   resolved "https://registry.yarnpkg.com/performance-now/-/performance-now-2.1.0.tgz#6309f4e0e5fa913ec1c69307ae364b4b377c9e7b"
   integrity sha1-Ywn04OX6kT7BxpMHrjZLSzd8nns=
 
-phin@^2.9.1:
-  version "2.9.3"
-  resolved "https://registry.yarnpkg.com/phin/-/phin-2.9.3.tgz#f9b6ac10a035636fb65dfc576aaaa17b8743125c"
-  integrity sha512-CzFr90qM24ju5f88quFC/6qohjC144rehe5n6DH900lgXmUe86+xCKc10ev56gRKC4/BkHUoG4uSiQgBiIXwDA==
-
 pify@^3.0.0:
   version "3.0.0"
   resolved "https://registry.yarnpkg.com/pify/-/pify-3.0.0.tgz#e5a4acd2c101fdf3d9a4d07f0dbc4db49dd28176"
@@ -3476,13 +3070,6 @@ pirates@^4.0.1:
   dependencies:
     node-modules-regexp "^1.0.0"
 
-pixelmatch@^4.0.2:
-  version "4.0.2"
-  resolved "https://registry.yarnpkg.com/pixelmatch/-/pixelmatch-4.0.2.tgz#8f47dcec5011b477b67db03c243bc1f3085e8854"
-  integrity sha1-j0fc7FARtHe2fbA8JDvB8wheiFQ=
-  dependencies:
-    pngjs "^3.0.0"
-
 pkg-dir@^3.0.0:
   version "3.0.0"
   resolved "https://registry.yarnpkg.com/pkg-dir/-/pkg-dir-3.0.0.tgz#2749020f239ed990881b1f71210d51eb6523bea3"
@@ -3495,7 +3082,7 @@ pn@^1.1.0:
   resolved "https://registry.yarnpkg.com/pn/-/pn-1.1.0.tgz#e2f4cef0e219f463c179ab37463e4e1ecdccbafb"
   integrity sha512-2qHaIQr2VLRFoxe2nASzsV6ef4yOOH+Fi9FBOVH6cqeSgUnoyySPZkxzLuzd+RYOQTRpROA0ztTMqxROKSb/nA==
 
-pngjs@^3.0.0, pngjs@^3.3.3:
+pngjs@^3.4.0:
   version "3.4.0"
   resolved "https://registry.yarnpkg.com/pngjs/-/pngjs-3.4.0.tgz#99ca7d725965fb655814eaf65f38f12bbdbf555f"
   integrity sha512-NCrCHhWmnQklfH4MtJMRjZ2a8c80qXeMlQMv2uVp9ISJMTt562SbGd6n2oq0PaPgKm7Z6pL9E2UlLIhC+SHL3w==
@@ -3537,11 +3124,6 @@ process-nextick-args@~2.0.0:
   resolved "https://registry.yarnpkg.com/process-nextick-args/-/process-nextick-args-2.0.1.tgz#7820d9b16120cc55ca9ae7792680ae7dba6d7fe2"
   integrity sha512-3ouUOpQhtgrbOa17J7+uxOTpITYWaGP7/AhoR3+A+/1e9skrzelGi/dXzEYyvbxubEF6Wn2ypscTKiKJFFn1ag==
 
-process@~0.5.1:
-  version "0.5.2"
-  resolved "https://registry.yarnpkg.com/process/-/process-0.5.2.tgz#1638d8a8e34c2f440a91db95ab9aeb677fc185cf"
-  integrity sha1-FjjYqONML0QKkduVq5rrZ3/Bhc8=
-
 progress@^2.0.0:
   version "2.0.3"
   resolved "https://registry.yarnpkg.com/progress/-/progress-2.0.3.tgz#7e8cf8d8f5b8f239c1bc68beb4eb78567d572ef8"
@@ -3635,11 +3217,6 @@ realpath-native@^1.1.0:
   dependencies:
     util.promisify "^1.0.0"
 
-regenerator-runtime@^0.13.3:
-  version "0.13.3"
-  resolved "https://registry.yarnpkg.com/regenerator-runtime/-/regenerator-runtime-0.13.3.tgz#7cf6a77d8f5c6f60eb73c5fc1955b2ceb01e6bf5"
-  integrity sha512-naKIZz2GQ8JWh///G7L3X6LaQUAMp2lvb1rvwwsURe/VXwD6VMfr+/1NuNw3ag8v2kY1aQ/go5SNn79O9JU7yw==
-
 regex-not@^1.0.0, regex-not@^1.0.2:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/regex-not/-/regex-not-1.0.2.tgz#1f4ece27e00b0b65e0247a6810e6a85d83a5752c"
@@ -3837,7 +3414,7 @@ sane@^4.0.3:
     minimist "^1.1.1"
     walker "~1.0.5"
 
-sax@>=0.6.0, sax@^1.2.4:
+sax@^1.2.4:
   version "1.2.4"
   resolved "https://registry.yarnpkg.com/sax/-/sax-1.2.4.tgz#2816234e2378bddc4e5354fab5caa895df7100d9"
   integrity sha512-NqVDv9TpANUjFm0N8uM5GxL36UgKi9/atZw+x7YFnQ8ckwFGKrl4xX4yWtrey3UJm5nP1kUbnYgLopqWNSRhWw==
@@ -4091,15 +3668,6 @@ string-width@^4.1.0:
     is-fullwidth-code-point "^3.0.0"
     strip-ansi "^5.2.0"
 
-string.prototype.trim@^1.1.2:
-  version "1.2.0"
-  resolved "https://registry.yarnpkg.com/string.prototype.trim/-/string.prototype.trim-1.2.0.tgz#75a729b10cfc1be439543dae442129459ce61e3d"
-  integrity sha512-9EIjYD/WdlvLpn987+ctkLf0FfvBefOCuiEr2henD8X+7jfwPnyvTdmW8OJhj5p+M0/96mBdynLWkxUr+rHlpg==
-  dependencies:
-    define-properties "^1.1.3"
-    es-abstract "^1.13.0"
-    function-bind "^1.1.1"
-
 string_decoder@~1.1.1:
   version "1.1.1"
   resolved "https://registry.yarnpkg.com/string_decoder/-/string_decoder-1.1.1.tgz#9cf1611ba62685d7030ae9e4ba34149c3af03fc8"
@@ -4215,16 +3783,6 @@ through@^2.3.6:
   resolved "https://registry.yarnpkg.com/through/-/through-2.3.8.tgz#0dd4c9ffaabc357960b1b724115d7e0e86a2e1f5"
   integrity sha1-DdTJ/6q8NXlgsbckEV1+Doai4fU=
 
-timm@^1.6.1:
-  version "1.6.1"
-  resolved "https://registry.yarnpkg.com/timm/-/timm-1.6.1.tgz#5f8aafc932248c76caf2c6af60542a32d3c30701"
-  integrity sha512-hqDTYi/bWuDxL2i6T3v6nrvkAQ/1Bc060GSkVEQZp02zTSTB4CHSKsOkliequCftQaNRcjRqUZmpGWs5FfhrNg==
-
-tinycolor2@^1.4.1:
-  version "1.4.1"
-  resolved "https://registry.yarnpkg.com/tinycolor2/-/tinycolor2-1.4.1.tgz#f4fad333447bc0b07d4dc8e9209d8f39a8ac77e8"
-  integrity sha1-9PrTM0R7wLB9TcjpIJ2POaisd+g=
-
 tmp@^0.0.33:
   version "0.0.33"
   resolved "https://registry.yarnpkg.com/tmp/-/tmp-0.0.33.tgz#6d34335889768d21b2bcda0aa277ced3b1bfadf9"
@@ -4395,13 +3953,6 @@ use@^3.1.0:
   resolved "https://registry.yarnpkg.com/use/-/use-3.1.1.tgz#d50c8cac79a19fbc20f2911f56eb973f4e10070f"
   integrity sha512-cwESVXlO3url9YWlFW/TA9cshCEhtu7IKJ/p5soJ/gGpj7vbvFrAY/eIioQ6Dw23KjZhYgiIo8HOs1nQ2vr/oQ==
 
-utif@^2.0.1:
-  version "2.0.1"
-  resolved "https://registry.yarnpkg.com/utif/-/utif-2.0.1.tgz#9e1582d9bbd20011a6588548ed3266298e711759"
-  integrity sha512-Z/S1fNKCicQTf375lIP9G8Sa1H/phcysstNrrSdZKj1f9g58J4NMgb5IgiEZN9/nLMPDwF0W7hdOe9Qq2IYoLg==
-  dependencies:
-    pako "^1.0.5"
-
 util-deprecate@~1.0.1:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/util-deprecate/-/util-deprecate-1.0.2.tgz#450d4dc9fa70de732762fbd2d4a28981419a0ccf"
@@ -4557,44 +4108,11 @@ ws@^5.2.0:
   dependencies:
     async-limiter "~1.0.0"
 
-xhr@^2.0.1:
-  version "2.5.0"
-  resolved "https://registry.yarnpkg.com/xhr/-/xhr-2.5.0.tgz#bed8d1676d5ca36108667692b74b316c496e49dd"
-  integrity sha512-4nlO/14t3BNUZRXIXfXe+3N6w3s1KoxcJUUURctd64BLRe67E4gRwp4PjywtDY72fXpZ1y6Ch0VZQRY/gMPzzQ==
-  dependencies:
-    global "~4.3.0"
-    is-function "^1.0.1"
-    parse-headers "^2.0.0"
-    xtend "^4.0.0"
-
 xml-name-validator@^3.0.0:
   version "3.0.0"
   resolved "https://registry.yarnpkg.com/xml-name-validator/-/xml-name-validator-3.0.0.tgz#6ae73e06de4d8c6e47f9fb181f78d648ad457c6a"
   integrity sha512-A5CUptxDsvxKJEU3yO6DuWBSJz/qizqzJKOMIfUJHETbBw/sFaDxgd6fxm1ewUaM0jZ444Fc5vC5ROYurg/4Pw==
 
-xml-parse-from-string@^1.0.0:
-  version "1.0.1"
-  resolved "https://registry.yarnpkg.com/xml-parse-from-string/-/xml-parse-from-string-1.0.1.tgz#a9029e929d3dbcded169f3c6e28238d95a5d5a28"
-  integrity sha1-qQKekp09vN7RafPG4oI42VpdWig=
-
-xml2js@^0.4.5:
-  version "0.4.19"
-  resolved "https://registry.yarnpkg.com/xml2js/-/xml2js-0.4.19.tgz#686c20f213209e94abf0d1bcf1efaa291c7827a7"
-  integrity sha512-esZnJZJOiJR9wWKMyuvSE1y6Dq5LCuJanqhxslH2bxM6duahNZ+HMpCLhBQGZkbX6xRf8x1Y2eJlgt2q3qo49Q==
-  dependencies:
-    sax ">=0.6.0"
-    xmlbuilder "~9.0.1"
-
-xmlbuilder@~9.0.1:
-  version "9.0.7"
-  resolved "https://registry.yarnpkg.com/xmlbuilder/-/xmlbuilder-9.0.7.tgz#132ee63d2ec5565c557e20f4c22df9aca686b10d"
-  integrity sha1-Ey7mPS7FVlxVfiD0wi35rKaGsQ0=
-
-xtend@^4.0.0:
-  version "4.0.2"
-  resolved "https://registry.yarnpkg.com/xtend/-/xtend-4.0.2.tgz#bb72779f5fa465186b1f438f674fa347fdb5db54"
-  integrity sha512-LKYU1iAXJXUgAXn9URjiu+MWhyUXHsvfp7mcuYm9dSUKK0/CjtrUwFAxD82/mCWbtLsGjFIad0wIsod4zrTAEQ==
-
 y18n@^4.0.0:
   version "4.0.0"
   resolved "https://registry.yarnpkg.com/y18n/-/y18n-4.0.0.tgz#95ef94f85ecc81d007c264e190a120f0a3c8566b"