update to 2.0.4

Author: lewzylu

src/Qcloud/Cos/Client.php

@@ -22,7 +22,7 @@
 
 
 class Client extends GuzzleClient {
-    const VERSION = '2.0.3';
+    const VERSION = '2.0.4';
 
     private $httpCilent;
     private $api;