Add support for bitbucket repositories

[czlowiek488]

Problem

Im using bitbucket and as I can see only github repositories are allowed.

/(github(?:\.[a-z]+)*\.[a-z]{2,})[:/]([^/]+)\/(.*)/

Suggested Solution

Add bitbucket to regexp.
in GitHubPlugin.js file I changed.
In constructor

const url = /(bitbucket(?:\.[a-z]+)*\.[a-z]{2,})[:/]([^/]+)\/(.*)/.exec(repoLinks[i]);

In getGitHubUrl

return [
   `https://${this.gitHubHostname}`,
   this.gitHubUser,
   this.gitHubProject,
   "src", // blob was previously
    this.branch,
    fileName.substr(this.path.length + 1),
  ].join("/");