Upgrade PHPMD

Author: natanfelles

composer.json

@@ -41,7 +41,7 @@
         "aplus/coding-standard": "^1.12",
         "ergebnis/composer-normalize": "^2.25",
         "jetbrains/phpstorm-attributes": "^1.0",
-        "phpmd/phpmd": "^2.12",
+        "phpmd/phpmd": "^2.13",
         "phpstan/phpstan": "^1.5",
         "phpunit/phpunit": "^9.5"
     },