lib/helpers/git/github/compare-commits.js
function githubCompareCommits(options, parseOptions) {
  return compareCommits(options)
    .then(function(commits) { return massageGithubCommits(commits, parseOptions); });
}
function githubCompareCommits(options, parseOptions) {
  return compareCommits(options)
    .then(function(commits) { return massageGithubCommits(commits, parseOptions); });
}
!

@param options passed to the Github API compareCommits function
@returns {Promise} returns a promise which resolves to an array of parsed commits