Merge pull request #478 from ckeditor/ci/3923

Other: Upgraded the minimal version of Node.js to 20.0.0 due to the end of LTS.

MAJOR BREAKING CHANGE: Upgraded the minimal version of Node.js to 20.0.0 due to the end of LTS.

Author: przemyslaw-zan

package.json

@@ -83,7 +83,7 @@
     "webpack-dev-middleware": "5.3.4"
   },
   "engines": {
-    "node": ">=18.0.0"
+    "node": ">=20.0.0"
   },
   "author": "CKSource (http://cksource.com/)",
   "license": "SEE LICENSE IN LICENSE.md",