feat: drop Node 4, 6, 8, 10, 12, 14 & 16 support

BREAKING CHANGE: Requires Node@^18.18.0 || ^20.9.0 || >=21.1.0

Author: MichaelDeBoey

Diff for: .github/workflows/node-minors.yml

@@ -1,4 +1,4 @@
-name: 'Tests: node.js (18+)'
+name: 'Tests: node.js'
 
 on: [pull_request, push]
 
@@ -14,7 +14,7 @@ jobs:
         with:
           versionsAsRoot: true
           type: majors
-          preset: '>=18'
+          preset: '^18.18.0 || ^20.9.0 || >=21.1.0'
 
   latest:
     needs: [matrix]

Diff for: .github/workflows/node-18+.yml renamed to .github/workflows/node.yml

@@ -85,7 +85,7 @@
     "eslint": "^3 || ^4 || ^5 || ^6 || ^7 || ^8 || ^9.7"
   },
   "engines": {
-    "node": ">=4"
+    "node": "^18.18.0 || ^20.9.0 || >=21.1.0"
   },
   "keywords": [
     "eslint",