Consideration for JWK <-> PEM formats

[nicktacular]

I was curious if you guys considered having a conversion build in for JWK <-> PEM formats? Perhaps even extension based so that if -o whatever.pem ended in PEM then you would use that format.

[npmccallum]

Yes, we have. I even have a (very stale) branch for working on this. But getting the core API right and usable CLI was a higher priority. Patches are welcome!

[asiplas]

#62 is a start—only useful for signing at the moment and needs some testing and review.

[asiplas]

Cursory testing—verification via https://jwt.io/ seems OK.