add test:cov script

Author: xdevor

composer.json

@@ -31,6 +31,7 @@
     },
     "scripts": {
         "test": "vendor/bin/pest",
+        "test:cov": "vendor/bin/pest --coverage",
         "test:type": "vendor/bin/phpstan analyse src tests --ansi --memory-limit=-1 --level=5"
     },
     "config": {