Merge pull request #15 from aternosorg/tests

Improve test coverage

Author: JulianVennen

composer.json

@@ -15,7 +15,7 @@
         "php": ">=8.3"
     },
     "require-dev": {
-        "phpunit/phpunit": "^10.5"
+        "phpunit/phpunit": "^12.1"
     },
     "autoload": {
         "psr-4": {