Support for social login

[da7a90-backup]

Hi! just came across this library and I think it's awesome. I've been using Cloudflare workers for a while now and this is what I was using for integrating login through google, github, discord ...etc https://github.com/da7a90-backup/worker-auth-providers

I would love to contribute if you think it would be a good addition to the toolkit where you could add it to the auth layer and using this with something like itty-router to simplify route handling and securing the whole app with a middleware.

[stretch07]

+1 to this!
@jplhomer can you let us know if you plan on doing this