chore: drop support for Node 16

.github/workflows/node.js.yml

@@ -0,0 +1,26 @@
+name: Node.js CI
+
+on:
+  push:
+    branches: ["master"]
+  pull_request:
+    branches: ["master"]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        node-version: [18.x, 20.x]
+
+    steps:
+      - uses: actions/checkout@v3
+      - name: Use Node.js ${{ matrix.node-version }}
+        uses: actions/setup-node@v3
+        with:
+          node-version: ${{ matrix.node-version }}
+          cache: "npm"
+      - run: npm ci
+      - run: npm run build --if-present
+      - run: npm test

README.md

@@ -30,7 +30,7 @@ I personally created this project to analyze npm packages by various criteria (p
 
 ## Requirements
 
-- [Node.js](https://nodejs.org/en/) v16 or higher
+- [Node.js](https://nodejs.org/en/) v18 or higher
 
 ## Getting Started
 
@@ -97,7 +97,9 @@ The root folder **"example"** contains real world examples that are used (for js
 ## Contributors ✨
 
 <!-- ALL-CONTRIBUTORS-BADGE:START - Do not remove or modify this section -->
+
 [![All Contributors](https://img.shields.io/badge/all_contributors-4-orange.svg?style=flat-square)](#contributors-)
+
 <!-- ALL-CONTRIBUTORS-BADGE:END -->
 
 Thanks goes to these wonderful people ([emoji key](https://allcontributors.org/docs/en/emoji-key)):

package.json

@@ -5,6 +5,9 @@
   "exports": "./dist/index.js",
   "types": "./dist/index.d.ts",
   "type": "module",
+  "engines": {
+    "node": ">=18.0.0"
+  },
   "bin": {
     "nsf": "./dist/bin/index.js"
   },