ci: minimum supported Node.js version is 18.12.0 (#7147)

Author: snitin315

.github/CONTRIBUTING.md

@@ -30,7 +30,7 @@ See the `package.json` for the full list of `scripts`.
 
 > **Note**
 >
-> **Node v14.20** or above is required for the build process to run properly.
+> **Node v18.12.0** or above is required for the build process to run properly.
 
 ## Contributor License Agreement
 

package.json

@@ -21,7 +21,7 @@
     "url": "https://github.com/webpack/webpack.js.org/issues"
   },
   "engines": {
-    "node": "^14.20.0 || ^16.15.0 || >=18.0.0"
+    "node": ">= 18.12.0"
   },
   "scripts": {
     "clean-dist": "rimraf ./dist",
@@ -137,7 +137,7 @@
     "webpack": "^5.89.0",
     "webpack-bundle-analyzer": "^4.10.1",
     "webpack-cli": "^5.1.4",
-    "webpack-dev-server": "^4.15.1",
+    "webpack-dev-server": "^5.0.2",
     "webpack-merge": "^5.10.0",
     "workbox-webpack-plugin": "^7.0.0",
     "yarn-deduplicate": "^6.0.2"