Apply workaround for query parameter serialization issue

Author: UkuLoskit

lib/Api/ContactsApi.php

@@ -2046,12 +2046,7 @@ protected function fetchContactsRequest($groupIds = null)
         $multipart = false;
 
         // query params
-        if (is_array($groupIds)) {
-            $groupIds = ObjectSerializer::serializeCollection($groupIds, 'multi', true);
-        }
-        if ($groupIds !== null) {
-            $queryParams['groupIds'] = ObjectSerializer::toQueryValue($groupIds);
-        }
+        $queryParams['groupIds'] = $groupIds;
 
 
         // body params