Update yoast/phpunit-polyfills requirement from ^0.2 to ^1.0

Updates the requirements on [yoast/phpunit-polyfills](https://github.com/Yoast/PHPUnit-Polyfills) to permit the latest version.
- [Release notes](https://github.com/Yoast/PHPUnit-Polyfills/releases)
- [Changelog](https://github.com/Yoast/PHPUnit-Polyfills/blob/develop/CHANGELOG.md)
- [Commits](Yoast/PHPUnit-Polyfills@0.2.0...1.0.0)

---
updated-dependencies:
- dependency-name: yoast/phpunit-polyfills
  dependency-type: direct:production
...

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

Author: dependabot[bot]

composer.json

@@ -20,7 +20,7 @@
         "wp-cli/eval-command": "^1 || ^2",
         "wp-cli/wp-cli": "^2",
         "wp-coding-standards/wpcs": "^2.3",
-        "yoast/phpunit-polyfills": "^0.2"
+        "yoast/phpunit-polyfills": "^1.0"
     },
     "require-dev": {
         "roave/security-advisories": "dev-master"