Pyrogram v2.1.20

Scheme layer used: 177

• Added get_stickers().

• Try to return the service message (when applicable) in the methods add_chat_members(), promote_chat_member().

• Added gifted_premium service message to Message.

• Added the field origin of type MessageOrigin in the class ExternalReplyInfo.

• Added the class MessageOrigin and replaced the fields forward_from, forward_from_chat, forward_from_message_id, forward_signature, forward_sender_name, and forward_date with the field forward_origin of type MessageOrigin in the class Message.