Feature: Allow HTTP Digest Auth

[subzero10]

Thank you for this Github Action!

I am using it to call an API that requires HTTP Digest. This PR replaces node-fetch with urllib, which supports HTTP Digest out-of-the-box.

Tests pass without any other changes 👌

Note:

• When I do npm run build, ncc generates more than one file, however it works fine.

[mydea]

Thanks for the PR!

Generally speaking, I'd rather like to not replace node-fetch with something else, especially as fetch is finally supported in Node 18, so eventually I'd like to actually remove it, and use native fetch instead.

I could not really find that much information about digest auth, to be honest, and don't really have any experience with it.

So in order to rather keep this a bit separate, I'd prefer to handle this a bit differently:

• Keep the node-fetch stuff as it was for now
• Allow to specify auth config
• If auth config is used, instead use this: https://www.npmjs.com/package/digest-fetch

This way, we can enapsulate this a bit. So simplified speaking, doFetch could look something like this:

New options:

• auth-user
• auth-password
• auth-use-digest (default: false)

function makeFetchRequest() {
  if (authUser && authPassword) {
    let client = new DigestFetch(authUser, authPassword, , { basic: !useDigestAuth });
    return client.fetch(url, options);
  }

  return fetch(url, options);
}

async function doFetch() {
  let response = await makeFetchRequest();
  // etc.
}

Also please make sure to not change the formatting, and I use let everywhere inside of methods ;)