Update phpunit/phpunit requirement from 10.5.27 to 11.4.1

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/11.4.1/ChangeLog-11.4.md)
- [Commits](sebastianbergmann/phpunit@10.5.27...11.4.1)

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

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

composer.json

@@ -17,7 +17,7 @@
     },
     "minimum-stability": "dev",
     "require-dev": {
-        "phpunit/phpunit": "10.5.27",
+        "phpunit/phpunit": "11.4.1",
         "php-coveralls/php-coveralls": "v2.7.0"
     },
     "require": {