Use activerecord `values_for_create` to replace `scope_for_create`
Use activerecord `values_for_create` to replace `scope_for_create`

In relation to the changes in `activerecord` version `5.2.2`
in using `scope_for_create` (https://github.com/rails/rails/pull/33639/files),
we must use the new method `values_for_create` provided.

krautcomputing/active_record-acts_as