chore(deps-dev): bump yoast/phpunit-polyfills from 3.0.0 to 4.0.0

Bumps [yoast/phpunit-polyfills](https://github.com/Yoast/PHPUnit-Polyfills) from 3.0.0 to 4.0.0.
- [Release notes](https://github.com/Yoast/PHPUnit-Polyfills/releases)
- [Changelog](https://github.com/Yoast/PHPUnit-Polyfills/blob/4.x/CHANGELOG.md)
- [Commits](Yoast/PHPUnit-Polyfills@3.0.0...4.0.0)

---
updated-dependencies:
- dependency-name: yoast/phpunit-polyfills
  dependency-type: direct:development
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

Diff for: composer.json

@@ -19,7 +19,7 @@
 		"dealerdirect/phpcodesniffer-composer-installer": "0.7.1",
 		"automattic/vipwpcs": "^1.0.0",
 		"phpunit/phpunit": "9.6.5",
-		"yoast/phpunit-polyfills": "^3.0",
+		"yoast/phpunit-polyfills": "^4.0",
 		"phpstan/phpstan": "^1.10",
 		"szepeviktor/phpstan-wordpress": "^1.3",
 		"php-stubs/woocommerce-stubs": "^9.1",