Update constructor
      
      Update({ 
    
    
- required int updateId,
- Message? message,
- Message? editedMessage,
- Message? channelPost,
- Message? editedChannelPost,
- InlineQuery? inlineQuery,
- ChosenInlineResult? chosenInlineResult,
- CallbackQuery? callbackQuery,
- ShippingQuery? shippingQuery,
- PreCheckoutQuery? preCheckoutQuery,
- Poll? poll,
- PollAnswer? pollAnswer,
- ChatMemberUpdated? myChatMember,
- ChatMemberUpdated? chatMember,
- ChatJoinRequest? chatJoinRequest,
Implementation
Update({
  required this.updateId,
  this.message,
  this.editedMessage,
  this.channelPost,
  this.editedChannelPost,
  this.inlineQuery,
  this.chosenInlineResult,
  this.callbackQuery,
  this.shippingQuery,
  this.preCheckoutQuery,
  this.poll,
  this.pollAnswer,
  this.myChatMember,
  this.chatMember,
  this.chatJoinRequest,
});