Set allow-plugins for Composer 2.2 (#2969)

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

composer.json

@@ -74,6 +74,9 @@
         "psr/log": "Required for using the Log middleware"
     },
     "config": {
+        "allow-plugins": {
+            "bamarni/composer-bin-plugin": true
+        },
         "preferred-install": "dist",
         "sort-packages": true
     },