TypeScript support

[rapropos]

I have TypeScript typings for js-jose, if you are interested in adding them. All that is required is to add one file and add a typings stanza to package.json, and TypeScript users will be able to seamlessly access the library with type checking. As it stands now, the JsonWebKey type will not resolve, because it is not yet defined in the official library. I have a PR pending that addresses this that needs to be resolved first.

If you have zero interest in going down this road at all, simply close out this issue and I will investigate alternative ways of distributing the typings via the typings registry.

[rmhrisk]

+1 for this

[alokmenghrajani]

👍