[core] Update Node.js version to v18 on CircleCI, CodeSandbox, and Netlify

.circleci/config.yml

@@ -44,7 +44,7 @@ defaults: &defaults
     AWS_REGION_ARTIFACTS: eu-central-1
   working_directory: /tmp/material-ui
   docker:
-    - image: cimg/node:14.21
+    - image: cimg/node:18.16
 
 # CircleCI has disabled the cache across forks for security reasons.
 # Following their official statement, it was a quick solution, they
@@ -672,7 +672,7 @@ jobs:
             DANGER_COMMAND: prepareBundleSizeReport
       - run:
           name: build @mui packages
-          command: yarn lerna run --ignore @mui/icons-material --parallel --scope "@mui/*" build
+          command: yarn lerna run --ignore @mui/icons-material --concurrency 8 --scope "@mui/*" build
       - run:
           name: create @mui/material canary distributable
           command: |

.codesandbox/ci.json

@@ -1,7 +1,7 @@
 {
   "buildCommand": "build:codesandbox",
   "installCommand": "install:codesandbox",
-  "node": "14",
+  "node": "18",
   "packages": [
     "packages/mui-material",
     "packages/mui-codemod",

netlify.toml

@@ -8,7 +8,7 @@
   command = "yarn docs:build && yarn docs:export"
 
 [build.environment]
-  NODE_VERSION = "14"
+  NODE_VERSION = "18"
   # Not using `playwright` when building docs.
   PLAYWRIGHT_SKIP_BROWSER_DOWNLOAD = "1"
 

packages/mui-material-next/src/Tabs/Tabs.test.js

@@ -338,11 +338,21 @@ describe('<Tabs />', () => {
 
           nodeEnv = process.env.NODE_ENV;
           // We can't use a regular assignment, because it causes a syntax error in Karma
-          Object.defineProperty(process.env, 'NODE_ENV', { value: 'development' });
+          Object.defineProperty(process.env, 'NODE_ENV', {
+            value: 'development',
+            configurable: true,
+            writable: true,
+            enumerable: true,
+          });
         });
 
         after(() => {
-          Object.defineProperty(process.env, 'NODE_ENV', { value: nodeEnv });
+          Object.defineProperty(process.env, 'NODE_ENV', {
+            value: nodeEnv,
+            configurable: true,
+            writable: true,
+            enumerable: true,
+          });
         });
 
         it('should warn if a Tab has display: none', () => {

packages/mui-material/src/Tabs/Tabs.test.js

@@ -375,11 +375,21 @@ describe('<Tabs />', () => {
 
           nodeEnv = process.env.NODE_ENV;
           // We can't use a regular assignment, because it causes a syntax error in Karma
-          Object.defineProperty(process.env, 'NODE_ENV', { value: 'development' });
+          Object.defineProperty(process.env, 'NODE_ENV', {
+            value: 'development',
+            configurable: true,
+            writable: true,
+            enumerable: true,
+          });
         });
 
         after(() => {
-          Object.defineProperty(process.env, 'NODE_ENV', { value: nodeEnv });
+          Object.defineProperty(process.env, 'NODE_ENV', {
+            value: nodeEnv,
+            configurable: true,
+            writable: true,
+            enumerable: true,
+          });
         });
 
         it('should warn if a `Tab` has display: none', function test() {