👷 build(package.json): improve build process and config

Author: chriskyfung

package-lock.json

@@ -5,7 +5,7 @@
   "description": "A Google Apps Script that helps you delete Gmail messages older than n days that match your custom regex filters.",
   "scripts": {
     "build": "npm run clean && node scripts/build.mjs && npm run update-timezone",
-    "clean": "rm -rf dist",
+    "clean": "rimraf dist",
     "update-timezone": "node scripts/update-timezone.mjs",
     "lint": "eslint src/**/*.js",
     "format": "prettier --write 'src/**/*.js'",
@@ -19,7 +19,8 @@
     "deployments": "clasp deployments",
     "versions": "clasp versions",
     "logs": "clasp logs",
-    "test": "jest"
+    "test": "jest",
+    "validate": "npm run lint && npm test"
   },
   "repository": {
     "type": "git",
@@ -53,8 +54,8 @@
     }
   },
   "engines": {
-    "node": ">=14.18.0",
-    "npm": ">=6.14.15"
+    "node": ">=18.18.0",
+    "npm": ">=8.0.0"
   },
   "devDependencies": {
     "@babel/core": "^7.28.3",
@@ -75,6 +76,7 @@
     "globals": "^16.3.0",
     "jest": "^30.0.5",
     "prettier": "^3.6.2",
+    "rimraf": "^6.0.1",
     "rollup": "^4.46.4"
   },
   "dependencies": {