Change parameters of update and delete methods

[fp024]

Hello,

I bought the book “Real-World Software Development” in Korea and I’m enjoying reading it.

I’ve read up to Chapter 2, and I found something unusual, so I submitted a PR.

In Example 2-9 of Chapter 2, the update() method seems a bit different from a typical update method.

I think it would be better if the update() method was designed to receive a BankTransaction domain as a parameter, which contains the target id and the content to be modified, and the delete() method was designed to receive only the id of the target to be deleted as a parameter. So, I made those modifications.

Thank you. 👍