message: Add updateResponse callback to replyAndUpdate type
diff: @@ -244,6 +244,9 @@ declare namespace botkit {
  title_link?: string;
  ts?: string;
  }
  + interface SlackUpdateMessageCallback {
  + (newResponse: string | SlackMessage, cb?: (err: Error) => void): void
  + }
  interface SlackBot extends Bot<SlackSpawnConfiguration, SlackMessage> {
  readonly api: SlackWebAPI;
  configureIncomingWebhook(config: { url: string; }): this;
  @@ -254,7 +257,7 @@ declare namespace botkit {
  identifyTeam(): string;
  identifyBot(): { id: string; name: string; team_id: string; };
  replyAcknowledge(cb?: (err: Error) => void): void;
  - replyAndUpdate(src: SlackMessage, resp: string | SlackMessage, cb: (err: Error, res: string) => void): void;
  + replyAndUpdate(src: SlackMessage, resp: string | SlackMessage, cb: (err: Error, res: string, updateResponse: SlackUpdateMessageCallback) => void): void;
  replyInThread(src: SlackMessage, resp: string | SlackMessage, cb: (err: Error, res: string) => void): void;
  replyPrivate(src: SlackMessage, resp: string | SlackMessage, cb?: (err: Error) => void): void;
  replyPrivateDelayed(src: SlackMessage, resp: string | SlackMessage, cb?: (err: Error) => void): void;
  