CHANGELOG
---------
- **2017-04-01**: 0.1.0
  - add updated message event support
- **2017-03-14**: 0.0.4
  - add debug level logging to `MessageHandler::update`
- **2017-03-13**: 0.0.3
  - fix `UserCreator::glip_user` bug
- **2017-01-01**: 0.0.1
  - Initial commit