Check-list for PRs

• Added .. versionadded:: NEXT.VERSION, .. versionchanged:: NEXT.VERSION, .. deprecated:: NEXT.VERSION or ``.. versionremoved:: NEXT.VERSION` to the docstrings for user facing changes (for methods/class descriptions, arguments and attributes)
• Created new or adapted existing unit tests
• Documented code changes according to the CSI standard
• [ ] Added myself alphabetically to AUTHORS.rst (optional)
• [ ] Added new classes & modules to the docs and all suitable __all__ s
• Checked the Stability Policy in case of deprecations or changes to documented behavior

If the PR contains API changes (otherwise, you can ignore this passage)

• Checked the Bot API specific sections of the Stability Policy

• [ ] Created a PR to remove functionality deprecated in the previous Bot API release (see here)

• New Classes

• Added New Shortcuts

  • In telegram.Chat & telegram.User for all methods that accept chat/user_id
  • [ ] In telegram.Message for all methods that accept chat_id and message_id
  • [ ] For new telegram.Message shortcuts: Added quote argument if methods accept reply_to_message_id
  • [ ] In telegram.CallbackQuery for all methods that accept either chat_id and message_id or inline_message_id

• If Relevant

  • Added new constants at telegram.constants and shortcuts to them as class variables
  • Linked new and existing constants in docstrings instead of hard-coded numbers and strings
  • Added the new method(s) to _extbot.py
  • Added or updated bot_methods.rst

- [ ] Added new message types to `telegram.Message.effective_attachment`
- [ ] Added new handlers for new update types
    - [ ] Added the handlers to the warning loop in the [`telegram.ext.ConversationHandler`](https://python-telegram-bot.readthedocs.io/en/stable/telegram.ext.conversationhandler.html)
- [ ] Added new filters for new message (sub)types
- [ ] Added or updated documentation for the changed class(es) and/or method(s)
- [ ] Updated the Bot API version number in all places: `README.rst` (including the badge) and `telegram.constants.BOT_API_VERSION_INFO`
- [ ] Added logic for arbitrary callback data in `telegram.ext.ExtBot` for new methods that either accept a `reply_markup` in some form or have a return type that is/contains [`telegram.Message`](https://python-telegram-bot.readthedocs.io/en/stable/telegram.message.html)