did-auth-jose requires hub-node-core

[dstrockis]

I can't use did-auth-jose without using the HttpResolver class from the hub-node-core package. If this is meant to be a standalone package I think some refactoring is in order. Example:

var hub = require('@decentralized-identity/hub-node-core');
var didAuth = require('@decentralized-identity/did-auth-jose')
const resolver = new hub.HttpResolver(discovery_endpoint);
const auth = new didAuth.Authentication({
    keys,
    resolver
});

[dstrockis]

@dstrockis