Offer Typescript or Javascript version

[JRJurman]

Summary

We should offer both a javascript and typescript version! I'm open to feedback about which version might be the default.

Potential Implementations

Probably should offer a flag (create-react-app has a template flag, but I don't think we need something that verbose):

npx tram-one-express app-name --ts
npx tram-one-express app-name --js

As far as what the code changes would be, we should wait until the app is simplified (#108).

It might be possible to have the typescript compiler provide a JS template (just ripping out the type definitions). If that is possible, that would allow us to minimize any code-duplication (and would scale the most easily).

[JRJurman]

We should make sure to offer whatever configuration is required to compile in Typescript (regardless of what template is being provided) - unless that would overly complicate the template - my hope would be that most of the tooling is provided by parcel.