feat: adds phpmd config

Author: mohanrajpac

composer.json

@@ -11,7 +11,9 @@
 		"phpunit/phpunit": "^9.4",
 		"yoast/wp-test-utils": "^1.2",
 		"squizlabs/php_codesniffer": "^3.7",
-		"m0hanraj/phpcs-config": "0.2.0"
+		"m0hanraj/phpcs-config": "0.2.1",
+		"m0hanraj/phpstan-config": "0.1.0",
+		"m0hanraj/phpmd-config": "0.1.0"
 	},
 	"autoload": {
 		"psr-4": {