createHook(options, cb) {
      return this._request('POST', `/repos/${this.__fullname}/hooks`, options, cb);
   }
Add a new hook to the repository
@see https://developer.github.com/v3/repos/hooks/#create-a-hook
@param {Object} options - the configuration describing the new hook
@param {Requestable.callback} cb - will receive the new webhook
@return {Promise} - the promise for the http request