message: Updating typings for interactive messages
  Updating SlackAttachment type for interactive messages
  Updating Message type for interactive message handling
diff: @@ -221,13 +221,18 @@ declare namespace botkit {
  action?: string;
  channel?: string;
  match?: RegExpMatchArray;
  + replace_original?: boolean;
  + response_type?: string;
  text?: string;
  user?: string;
  }
  interface SlackAttachment {
  + attachment_type?: string;
  + actions?: any[];
  author_icon?: string;
  author_link?: string;
  author_name?: string;
  + callback_id?: string;
  color?: string;
  fallback?: string;
  fields?: {
  