Readme Example Errors and Fix, Ed25519Signature2020 loading issue

[Wind4Greg]

Hi, ran into some problems getting the examples from the README and NPM to run. By borrowing code from the mocha tests the following works to issue a sample credential.

// To run in Node.js use put this in a *.mjs file or set "type": "module" in
// your package.json file.

import {
    Ed25519VerificationKey2018
} from '@digitalbazaar/ed25519-verification-key-2018';
import { Ed25519Signature2018 } from '@digitalbazaar/ed25519-signature-2018';
import {issue} from '@digitalbazaar/vc';

let keyPair = await Ed25519VerificationKey2018.generate({
    id: 'https://example.edu/issuers/keys/1',
    controller: 'https://example.edu/issuers/565049'
});
console.log(keyPair);

// Set up the signature suite, using the generated key
let suite = new Ed25519Signature2018({
    verificationMethod: 'https://example.edu/issuers/keys/1',
    key: keyPair
});
console.log(suite);

const mockCredential = {
    '@context': [
        'https://www.w3.org/2018/credentials/v1',
        'https://www.w3.org/2018/credentials/examples/v1'
    ],
    id: 'http://example.edu/credentials/1872',
    type: ['VerifiableCredential', 'AlumniCredential'],
    issuer: 'https://example.edu/issuers/565049',
    issuanceDate: '2010-01-01T19:23:24Z',
    credentialSubject: {
        id: 'did:example:ebfeb1f712ebc6f1c276e12ec21',
        alumniOf: '<span lang="en">Example University</span>'
    }
};

let verifiableCredential = await issue({
    credential: mockCredential,
    suite
});

console.log(verifiableCredential);

If I try to use the Ed25519VerificationKey2020 and Ed25519Signature2020 packages I get the following error:

code: 'loading remote context failed',
url: 'https://w3id.org/security/suites/ed25519-2020/v1',
cause: Error: Document loader unable to load URL "https://w3id.org/security/suites/ed25519-2020/v1".

However the JSON document seems resolvable in my web browser. Any ideas of what is going wrong. Note that the Mocha tests do not test the *2020 packages.

Cheers
Greg