[core] Update supported Node.js version to 14 (#43315)

Author: Janpot

.github/workflows/ci.yml

@@ -9,7 +9,6 @@ on:
   pull_request:
     paths-ignore:
       # should sync with ci-check.yml as a workaround to bypass github checks
-      - 'docs/**'
       - 'examples/**'
 
 permissions: {}

docs/data/material/getting-started/supported-platforms/supported-platforms.md

@@ -25,7 +25,7 @@ You can expect Material UI's components to render without major issues.
 
 <!-- #stable-snapshot -->
 
-Material UI supports [Node.js](https://github.com/nodejs/node) starting with version 12.0 for server-side rendering.
+Material UI supports [Node.js](https://github.com/nodejs/node) starting with version 14.0 for server-side rendering.
 The objective is to support Node.js down to the [last version in maintenance mode](https://github.com/nodejs/Release#release-schedule).
 
 ## React

packages/mui-material/package.json

@@ -102,7 +102,7 @@
     "directory": "build"
   },
   "engines": {
-    "node": ">=12.0.0"
+    "node": ">=14.0.0"
   },
   "pigment-css": {
     "vite": {

packages/mui-utils/package.json

@@ -76,6 +76,6 @@
     "directory": "build"
   },
   "engines": {
-    "node": ">=12.0.0"
+    "node": ">=14.0.0"
   }
 }