moved to connect-rest 2.0

[imrefazekas]

Dear Ethan, I moved the code to connect-rest 2.0. The very minimal to make it work, test ran without error.

[reybango]

@imrefazekas thanks for jumping here and making the changes. I'm sure @EthanRBrown will be happy too since he's working on the next edition of his book.

A couple of comments about this commit.

• In his book, the context property for apiOptions uses a '/' but in your commit you've set it to an empty string. Was that a change to connect-rest in v2+?
• Again in apiOptions, your commit removes the domain property which @EthanRBrown used to define a unique execution context for the api. Is there a better way to define that in connect-rest?
• Your commit removes the apiOptions.domain.ondomain error handler which @EthanRBrown references in the book. Is there a better way to define that?

Again, thank you so much for jumping in and helping make the book even better and helping readers like myself leverage the updates.