Update PHPMD tests call

Author: MKodde

composer.json

@@ -37,7 +37,7 @@
   "scripts": {
     "tests": {
       "docheader": "vendor/bin/docheader check src/",
-      "phpcmd": "vendor/bin/phpmd src xml phpmd.xml --exclude=*/Tests/*",
+      "phpcmd": "vendor/bin/phpmd src text phpmd.xml",
       "phpcs": "vendor/bin/phpcs src --report=full --standard=phpcs.xml --extensions=php --warning-severity=0",
       "phpcpd": "vendor/bin/phpcpd src --exclude=src/Tests/*",
       "phpunit": "vendor/bin/phpunit --coverage-text"