Set allow-plugins for Composer 2.2 (#505)

This new configuration has been introduced with Composer 2.2: https://github.com/composer/composer/releases/tag/2.2.0-RC1

Author: villfa

composer.json

@@ -41,6 +41,9 @@
         "ext-pcre": "Required to use most of the library."
     },
     "config": {
+        "allow-plugins": {
+            "bamarni/composer-bin-plugin": true
+        },
         "preferred-install": "dist"
     },
     "extra": {