Update CommonService.php

Author: HGthecode

src/providers/CommonService.php

@@ -74,7 +74,7 @@ abstract static function getLang($lang);
      * 处理apidoc接口响应的数据
      * @return mixed
      */
-    abstract function handleResponseJson();
+    abstract static function handleResponseJson();
 
     abstract static function getTablePrefix();