listStarredGists(options, cb) {
      options = options || {};
      if (typeof options === 'function') {
         cb = options;
         options = {};
      }
      options.since = this._dateToISO(options.since);
      return this._request('GET', '/gists/starred', options, cb);
   }
Gets the list of starred gists for the user
@see https://developer.github.com/v3/gists/#list-starred-gists
@param {Object} [options={}] - any options to refine the search
@param {Requestable.callback} [cb] - will receive the list of gists
@return {Promise} - the promise for the http request