updateRelease(id, options, cb) {
      return this._request('PATCH', `/repos/${this.__fullname}/releases/${id}`, options, cb);
   }
Edit a release
@see https://developer.github.com/v3/repos/releases/#edit-a-release
@param {string} id - the id of the release
@param {Object} options - the description of the release
@param {Requestable.callback} cb - will receive the modified release
@return {Promise} - the promise for the http request