Merge pull request #22 from aternosorg/update-phpunit

Update phpunit to 12.3

Author: pavog

composer.json

@@ -25,7 +25,7 @@
     "psr/http-factory": "^1.1"
   },
   "require-dev": {
-    "phpunit/phpunit": "^10.5"
+    "phpunit/phpunit": "^12.3"
   },
   "suggest": {
     "ext-cassandra": "To use the Cassandra NoSQL driver",