v0.2.0

Synced with Max Bot API schema 0.0.33.

• Added edit_my_commands (PATCH /me/commands); set_my_commands and delete_my_commands now use it instead of PATCH /me.
• Added add_chat_admins and remove_chat_admin.
• Added comment methods: get_comments, get_comment, send_comment, edit_comment, delete_comment (api.raw.comments).
• Added get_video_info (GET /videos/{videoToken}).
• Added ContactAttachment, InlineKeyboardAttachment and Button builders; attachment objects now serialize to JSON without an explicit to_h.
• Added limit to poll_updates; an empty types list is no longer sent.
• Fixed remove_chat_member: user_id and block are sent as query parameters, as the schema requires.
• Fixed get_message, which raised ArgumentError.
• Fixed answer_on_callback: disable_link_preview is sent as a query parameter.
• false query values are now sent as false instead of being dropped.
• Sending a message is retried at most 3 times on attachment.not.ready, with exponential backoff.
• delete_message no longer accepts extra options (they raised ArgumentError).
• Deprecated edit_my_info, get_all_chats, get_chat_by_link and add_chat_members: their endpoints are removed from the API or absent from the schema.