Allow "phpstan/extension-installer" composer plugins

Author: Jeremiah VALERIE

composer.json

@@ -22,7 +22,10 @@
     },
     "config": {
         "bin-dir": "bin",
-        "sort-packages": true
+        "sort-packages": true,
+        "allow-plugins": {
+            "phpstan/extension-installer": true
+        }
     },
     "require": {
         "php": "^8.0",