Bump phpunit/phpunit from 11.5.50 to 12.5.22 (#25)

Bumps [phpunit/phpunit](https://github.com/sebastianbergmann/phpunit) from 11.5.50 to 12.5.22.
- [Release notes](https://github.com/sebastianbergmann/phpunit/releases)
- [Changelog](https://github.com/sebastianbergmann/phpunit/blob/12.5.22/ChangeLog-12.5.md)
- [Commits](sebastianbergmann/phpunit@11.5.50...12.5.22)

---
updated-dependencies:
- dependency-name: phpunit/phpunit
  dependency-version: 12.5.22
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

composer.json

@@ -50,7 +50,7 @@
     ],
     "require-dev": {
         "phpstan/phpstan": "^2",
-        "phpunit/phpunit": "^11",
+        "phpunit/phpunit": "^11 || ^12",
         "bnf/phpstan-psr-container": "^1.0",
         "friendsofphp/php-cs-fixer": "^3.87"
     },