feat:return must type

@@ -704,7 +704,7 @@ temp;
         $template[] = "\t" . ' * @param array $params';
         $template[] = "\t" . ' * @return ResultSet';
         $template[] = "\t" . ' */';
-        $template[] = "\t" . 'function ' . $subSelf->name . '(array $params = []);';
+        $template[] = "\t" . 'function ' . $subSelf->name . '(array $params = []): ResultSet;';
 
         return $template;
     }