updateMessageReactions function
Adds and/or removes reaction on the message with messageId
messageId - the ID of the message you reacted on
addReaction - the new reaction you want to add
removeReaction - the reaction you added before and want to delete
Implementation
Future<void> updateMessageReactions(String messageId,
    {String? addReaction, String? removeReaction}) {
  return UpdateMessageReactionQuery(
    messageId,
    addReaction: addReaction,
    removeReaction: removeReaction,
  ).perform();
}