code: function convertPr (bbPr) {
    return {
      description: bbPr.description,
      headSha: bbPr.source.commit.hash,
      number: bbPr.id,
      url: bbPr.links.self.href
    }
  }
docs: Convert a Bitbucket PR to a PR representation
  @param {BitbucketPullRequest} bbPr - the API response from a Bitbucket API looking for a PR
  @returns {PullRequest} a pull request in standard format