Add support for creating PR's in GHES (GitHub enterprise server) behind proxy

[sethumadhav07]

Currently 'create-pull-request' can't create PR's in GHES and behind proxy. Is it possible to add support? That would be a very nice addition.

octokit constructor has options to include base url as well as proxy : https://github.com/octokit/octokit.js#constructor-options

e.g.

const proxy = new HttpsProxyAgent(process.env.http_proxy);
   let octokit = new Octokit({
      baseUrl: `${baseurl}/api/v3`,
      request: {
        agent: proxy,
      },
    });

Is it also possible to improve on additional outputs (e.g. html_url) instead of constructing url ourselves?

const html_url = pullRequest.data.html_url;
 setOutput("html_url", html_url);

[thomaseizinger]

Currently 'create-pull-request' can't create PR's in GHES and behind proxy. Is it possible to add support? That would be a very nice addition.

Yep, I would accept a PR for that.

Is it also possible to improve on additional outputs (e.g. html_url) instead of constructing url ourselves?

Yep, also happy to accept a PR for that.