完成打包测试，准备更新到最新的Unity

Assets/Plugins/Script/AssetUpdate/Actions/AssetVersionAction.cs

@@ -42,8 +42,10 @@ namespace AssetUpdate
             // 当前资源清单不存在或者过时
             if (mainInfo == null)
             {
+                var oldUri = uri;
                 uri = uri.Open(serverVersion.ToString()).Open(fileName);
                 var path = AssetConst.persistentDataPath.Open(fileName);
+                Debug.Log("Download version file from: " + uri + " url: " + oldUri);
                 _downloader = new AssetUpdateDownloader(uri, path) {onComplete = OnComplete};
                 _downloader.Start();
             }