chore(deps-dev): bump yoast/phpunit-polyfills from 1.1.0 to 2.0.1

Bumps [yoast/phpunit-polyfills](https://github.com/Yoast/PHPUnit-Polyfills) from 1.1.0 to 2.0.1.
- [Release notes](https://github.com/Yoast/PHPUnit-Polyfills/releases)
- [Changelog](https://github.com/Yoast/PHPUnit-Polyfills/blob/2.x/CHANGELOG.md)
- [Commits](Yoast/PHPUnit-Polyfills@1.1.0...2.0.1)

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

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

composer.json

@@ -53,7 +53,7 @@
     "wp-coding-standards/wpcs": "2.3.0",
     "dealerdirect/phpcodesniffer-composer-installer": "^0.7.1",
     "phpunit/phpunit": "5.*",
-    "yoast/phpunit-polyfills": "^1.0"
+    "yoast/phpunit-polyfills": "^2.0"
   },
   "config": {
     "allow-plugins": {