• Fixed TypeError: Value should be instance of 'User' not 'NoneType' (#527)
• Added missing Chat.message_auto_delete_time field (#535)
• Added MediaGroup filter (#528)
• Added Chat.delete_message shortcut (#526)
• Added mime types parsing for aiogram.types.Document (#431)
• Added warning in TelegramObject.__setitem__ when Telegram adds a new field (#532)
• Fixed examples/chat_type_filter.py (#533)
• Removed redundant definitions in framework code (#531)