feat: ✨ criar promise de response de imagens

+ renomear waitDownload.js

js/promises.js

@@ -0,0 +1,30 @@
+export async function waitUntilDownload (page) {
+  return new Promise((resolve, reject) => {
+    page._client().on('Page.downloadProgress', (e) => {
+      // or 'Browser.downloadProgress'
+      console.clear()
+      if (e.state === 'completed') {
+        console.log('Chart downloaded!')
+        resolve()
+      } else if (e.state === 'canceled') {
+        reject(new Error('Download canceled'))
+      }
+    })
+  })
+}
+
+export async function waitImageResponses (page, numImgs, responseCount = 0) {
+  await new Promise((resolve, _reject) => {
+    page.on('response', async (response) => {
+      if (response.url().startsWith('https://lastfm.freetls.fastly.net/i/u/')) {
+        responseCount++
+        console.clear()
+        console.log(`Image ${responseCount} of ${numImgs} downloaded...`)
+
+        if (responseCount === numImgs) {
+          resolve()
+        }
+      }
+    })
+  })
+}