Upgrade PHPMD

Author: natanfelles

composer.json

@@ -37,7 +37,7 @@
     "require-dev": {
         "ext-xdebug": "*",
         "ergebnis/composer-normalize": "^2.28",
-        "phpmd/phpmd": "^2.12",
+        "phpmd/phpmd": "^2.13",
         "phpstan/phpstan": "^1.8",
         "phpunit/phpunit": "^9.5"
     },