Add missing fieldset parameter

Author: Erol

lib/fast_jsonapi/serialization_core.rb

@@ -67,7 +67,7 @@ def record_hash(record, fieldset, params = {})
             temp_hash[:links] = links_hash(record, params) if data_links.present?
             temp_hash
           end
-          record_hash[:relationships] = record_hash[:relationships].merge(relationships_hash(record, uncachable_relationships_to_serialize, params)) if uncachable_relationships_to_serialize.present?
+          record_hash[:relationships] = record_hash[:relationships].merge(relationships_hash(record, uncachable_relationships_to_serialize, fieldset, params)) if uncachable_relationships_to_serialize.present?
           record_hash
         else
           record_hash = id_hash(id_from_record(record), record_type, true)