Would it be a good idea to update this exercise using React V18? 

Hi there,
I really like the exercise, however, I noticed that it uses React version 16, so it has features that are deprecated in the latest version. I was wondering if it would be a good idea to update the exercise using new React features. 
In fact, in our class, we had to update React. If you think it's a good idea, I'm happy to create a PR to update it. 

Thank you! 
