Update CI to use Node.js 18+ (required by Puppeteer v22)

- Update GitHub Actions workflow to test on Node.js 18.x, 20.x, 22.x
- Add engines field to package.json specifying Node.js >=18 requirement
- Puppeteer v22 requires Node.js 18+, so older versions are no longer supported
- Fixes CI failures caused by lockfileVersion 3 incompatibility with npm 6.x

Author: openhands-agent

.github/workflows/node.js.yml

@@ -12,7 +12,8 @@ jobs:
 
     strategy:
       matrix:
-        node-version: [14.x, 16.x, 18.x]
+        # Node.js 18+ required for Puppeteer v22
+        node-version: [18.x, 20.x, 22.x]
 
     steps:
     - uses: actions/checkout@v3

package.json

@@ -3,6 +3,9 @@
   "version": "3.13.0",
   "main": "index.js",
   "types": "index.d.ts",
+  "engines": {
+    "node": ">=18"
+  },
   "scripts": {
     "test": "mocha --reporter-option maxDiffSize=0 --exit",
     "build": "./scripts/build.sh"