version 3.0.13 release

Author: sf-jin-ku

README.md

@@ -27,7 +27,7 @@ SendBird-SDK-JavaScript
 # [Documentation](https://docs.sendbird.com/javascript)
 
 
-## Upgrading to v3.0.12
+## Upgrading to v3.0.13
   If you want to check the record of other version, go to [Change Log](https://github.com/smilefam/SendBird-SDK-JavaScript/blob/master/CHANGELOG.md).  
  * Fixed a reconnection bug happening after calling disconnect() and connect() in serial.
  * Added "custom_type" field to message/file object.