添加推送的消息推送的api

src/ucenter/Message.php

@@ -128,7 +128,7 @@ class Message extends Client
      * @param int $type 类型 0 早报 1 求助 2 系统推送
      * @return  mixed
      */
-    public static function pushMsg($title, $url, $desc, $userId = 0, $from = 4, $type = 0)
+    public static function pushMsg($title, $url, $desc, $userId = 0, $from = 'u', $type = 0)
     {
         return self::call('message.pushMsg', compact('title', 'url', 'desc', 'userId','from','type'));
     }