Hey! You're PRing? Cool! Please have a look at the below checklist. It's here to help both you and the maintainers to remember some aspects. Make sure to check out our contribution guide (https://github.com/python-telegram-bot/python-telegram-bot/blob/master/.github/CONTRIBUTING.rst).
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### Checklist for PRs
- [ ] Added `.. versionadded:: version`, `.. versionchanged:: version` or `.. deprecated:: version` to the docstrings for user facing changes (for methods/class descriptions, arguments and attributes)
- [ ] Updated the Bot API version number in all places: `README.rst` and `README_RAW.rst` (including the badge), as well as `telegram.constants.BOT_API_VERSION`
- [ ] Added logic for arbitrary callback data in `tg.ext.Bot` for new methods that either accept a `reply_markup` in some form or have a return type that is/contains `telegram.Message`