Bot API 2.3 was announced on 2016-11-21, need to support new changes.

• New fields channel_post and edited_channel_post for Update.
  • It is not possible to unitest it with the current framework. Tested by hand.
• New force parameter in setGameScore.
  • Unitests.
• Changed behaviour: messages with high scores will be update with new high scores by default. (documentation fix)
• Use (new) disable_edit_message in setGameScore to disable the above new behaviour.
  • Unitests.
• The edit_message parameter from setGameScore is no longer in use. For backward compatibility, it will be taken into account for a while, unless disable_edit_message is passed explicitly.
  • Need deprecation warning and maybe some sanity checks on input.
  • Unitests.
• New field forward_from_message_id for Message.
  • Unitests.
• New parameter cache_time for answerCallbackQuery.
  • It is not possible to unitest it with the current framework. Tested by hand.
• Renamed hide_keyboard to remove_keyboard in ReplyKeyboardRemove for clarity. hide_keyboard will still work for a while for backward compatibility.
  • Need deprecation warning on the old ReplyKeyboardHide.
  • Unitests.
• Need to "remember" for future releases to remove the deprecated code. (ReplyKeyboardHide, edit_message in setGameScore)