Add Composer v2 compatibility

composer.json

@@ -18,7 +18,7 @@
   "minimum-stability": "dev",
   "name": "fgm/drupal_composer_builder",
   "require": {
-    "composer-plugin-api": "^1.1",
+    "composer-plugin-api": "^1.1 || ^2.0.0",
     "composer/installers": "^1.2"
   },
   "type": "composer-plugin",