AWS KMS Support

Hi,
I would like to add support to AWS KMS to jsonwebtoken library.
I was wondering if the play to add this support is in this library.

I have updated other jwt library (https://github.com/fjcabello/jwt-kms)  but I would prefer to add this feature in a more standard library.

What do you think?

Thanks,

Paco

