Improvements

[MarkBiesheuvel]

• Avoid devDependencies being uploaded with the node_modules folder
• Switch to Yarn
• Pass all data from the JWT to the Authorizer, so it can be used in the API Gateway

If you don't like the code style you can merge from ba4a157 instead of 10afb49.

[dkavanagh]

I'll be using this project, so I'd be happy to try out your version.

[MarkBiesheuvel]

Cool, let me know how it works out and if you'd like some modifications.