chore: update engines.node to >=18 and CI matrix to [18, 20, 22]

Author: polygonplanet

.github/workflows/ci.yml

@@ -8,7 +8,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, windows-latest]
-        node: [16, 18, 20]
+        node: [18, 20, 22]
     name: Test
     runs-on: ${{ matrix.os }}
 

package.json

@@ -16,7 +16,7 @@
     "watch": "watchify src/index.js -o encoding.js -s Encoding -p [ bannerify --file src/banner.js ] --no-bundle-external --bare --poll=300 -v"
   },
   "engines": {
-    "node": ">=8.10.0"
+    "node": ">=18.0.0"
   },
   "repository": {
     "type": "git",