* kick handler test
* Add authentication and fix bugs
* Add help text
* minor fix
* Remove useless comments
* Get user object from reply first.
* Update bot.py
* minor fix
* update help text
* Update AUTHORS.md
* Remove old /kick implementation
* minor fix
* Manually merge upstream changes
* No need to accept args
* remove unused chat_setting.py
* botan
* import botan from submodule for compatibility with python-telegram-bot 8.1+
* fix typo
* Update requirements.txt
* delete submodule
* Drop botan support completely
* Refine the way of getting config
* Bug fix
