Merge pull request #2 from EngineScript/dependabot/composer/yoast/phpunit-polyfills-tw-4.0

Update yoast/phpunit-polyfills requirement from ^2.0 to ^4.0

Author: PDowney

composer.json

@@ -15,7 +15,7 @@
   },
   "require-dev": {
     "phpunit/phpunit": "^9.5",
-    "yoast/phpunit-polyfills": "^2.0",
+    "yoast/phpunit-polyfills": "^4.0",
     "wp-coding-standards/wpcs": "^2.3",
     "dealerdirect/phpcodesniffer-composer-installer": "^0.7.1"
   },