API 7.3

[Bibo-Joshi]

Closes #4236.

• PRS to mention: Api 7.3 InputPollOption #4248, API 7.3 Chat Backgrounds and new params #4247, API 7.3: ChatFullInfo, Readmes #4242, Api 7.3 docs #4246, Api 7.3 polls #4260

Checklist

• Added .. versionadded:: NEXT.VERSION, .. versionchanged:: NEXT.VERSION or .. deprecated:: 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 <https://standards.mousepawmedia.com/en/stable/csi.html>__
• Added myself alphabetically to AUTHORS.rst (optional)
• Added new classes & modules to the docs and all suitable __all__ s
• Checked the Stability Policy <https://docs.python-telegram-bot.org/stability_policy.html>_ 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

• New classes:

  • Added self._id_attrs and corresponding documentation
  • __init__ accepts api_kwargs as kw-only

• Added new shortcuts:

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

• If relevant:

  • Added new constants at :mod:telegram.constants and shortcuts to them as class variables
  • Link new and existing constants in docstrings instead of hard-coded numbers and strings
  • Add new message types to :attr:telegram.Message.effective_attachment
  • Added new handlers for new update types
  • Add the handlers to the warning loop in the :class:~telegram.ext.ConversationHandler
  • Added new filters for new message (sub)types
  • Added or updated documentation for the changed class(es) and/or method(s)
  • Added the new method(s) to _extbot.py
  • Added or updated bot_methods.rst
  • 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_INFO
  • Added logic for arbitrary callback data in :class:telegram.ext.ExtBot for new methods that either accept a reply_markup in some form or have a return type that is/contains :class:~telegram.Message

[github-actions]

Hey! Looks like you edited README.rst or README_RAW.rst. I'm just a friendly reminder to apply relevant changes to both of those files :)