- Use `urllib3.PoolManager` for connection re-use - Rewrite `run_async` decorator to re-use threads - New requirements: `urllib3` and `certifi`
4.2.1
- Fix `CallbackQuery.to_dict()` bug (thanks to jlmadurga) - Fix `editMessageText` exception when receiving a `CallbackQuery`
4.2
- Implement Bot API 2.1 - Move `botan` module to `telegram.contrib` - New exception type: `BadRequest`
4.1.2
- Fix `MessageEntity` decoding with Bot API 2.1 changes
4.1.1
- Fix deprecation warning in `Dispatcher`
4.1
- Implement API changes from May 6, 2016 - Fix bug when start_polling with clean=True (275) - Methods now have snake_case equivalent, for example `telegram.Bot.send_message` is the same as `telegram.Bot.sendMessage` (265)