May 22, 2016

• Bot API 2.1. Added more tools for group administrator bots. Your bot can now get a list of administrators and members count in a group, check a user's current status (administrator, creator, left the group, kicked from the group), and leave a group.
• Added new methods: getChat, leaveChat, getChatAdministrators, getChatMember, getChatMembersCount.
• Added support for edited messages and new mentions from Telegram v.3.9. New fields: edited_message in Update, edit_date in Message, user in MessageEntity. New value text_mention for the type field in MessageEntity.