feat: 🎸 add dropdown support for radio buttons

addons/api/tests/unit/serializers/role-test.js

@@ -21,6 +21,7 @@ module('Unit | Serializer | role', function (hooks) {
       name: 'User',
       description: 'Description',
       version: 1,
+      grant_scope_id: null
     });
   });