Update phpunit/phpunit requirement from ^9.0 to ^11.2

Updates the requirements on [phpunit/phpunit](https://github.com/sebastianbergmann/phpunit) to permit the latest version.
- [Release notes](https://github.com/sebastianbergmann/phpunit/releases)
- [Changelog](https://github.com/sebastianbergmann/phpunit/blob/11.2.6/ChangeLog-11.2.md)
- [Commits](sebastianbergmann/phpunit@9.0.0...11.2.6)

---
updated-dependencies:
- dependency-name: phpunit/phpunit
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <support@github.com>

composer.json

@@ -29,7 +29,7 @@
  },
  "require-dev": {
  "mockery/mockery": "^1.3",
- "phpunit/phpunit": "^9.0",
+ "phpunit/phpunit": "^11.2",
  "jetbrains/phpstorm-attributes": "^1.0",
  "phpstan/phpstan": "^1.7",
  "laravel/pint": "^1.2"