fix that phpunit if of course only in composer dev dependencies

Author: pscheit

composer.json

@@ -10,14 +10,14 @@
   ],
   "require": {
     "php": ">=8.0.0",
-    "ext-mbstring": "*",
-    "phpunit/phpunit": "^10.0"
+    "ext-mbstring": "*"
   },
   "require-dev": {
     "mikey179/vfsstream": "^1.6@stable",
     "mockery/mockery": "@stable",
     "webforge/collections": "^1.0@dev",
-    "friendsofphp/php-cs-fixer": "^3"
+    "friendsofphp/php-cs-fixer": "^3",
+    "phpunit/phpunit": "^10.5"
   },
   "autoload": {
     "psr-0": {"Webforge\\Common": ["src/php/", "tests/php/"]}