Bump phpunit/phpunit from 11.5.15 to 12.1.0

Bumps [phpunit/phpunit](https://github.com/sebastianbergmann/phpunit) from 11.5.15 to 12.1.0.
- [Release notes](https://github.com/sebastianbergmann/phpunit/releases)
- [Changelog](https://github.com/sebastianbergmann/phpunit/blob/12.1.0/ChangeLog-12.1.md)
- [Commits](https://github.com/sebastianbergmann/phpunit/compare/11.5.15...12.1.0)

---
updated-dependencies:
- dependency-name: phpunit/phpunit
  dependency-version: 12.1.0
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

composer.json

@@ -125,7 +125,7 @@
         "mockery/mockery": "^1.6",
         "nunomaduro/collision": "^8.6",
         "php-coveralls/php-coveralls": "^2.4",
-        "phpunit/phpunit": "^11.5.3",
+        "phpunit/phpunit": "^12.1.0",
         "rector/rector": "^2.0"
     },
     "suggest": {