Moar updates!

• Live locations
  • add live_period to send_location
  • add edit_message_live_location
  • add stop_message_live_location
  • add live_period to InlineQueryResultLocation and InputLocationMessageContent
  • Tests
• Group sticker management
  • add get_chat_sticker_set
  • add delete_chat_sticker_set
  • add Chat.sticker_set_name
  • add Chat.can_set_sticker_set
• add caption_entities in Message
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