[typescript] Add isTimeZoneAgnostic in Typescript types (#432)

This was added by #354 and just didn't have updated typescript types.

Author: jonzlin95

index.d.ts

@@ -208,6 +208,10 @@ export type NotificationRequest = {
    * Optional data to be added to the notification
    */
   userInfo?: Record<string, any>;
+  /**
+   * If true, fireDate adjusted automatically upon time zone changes (e.g. for an alarm clock).
+   */
+  isTimeZoneAgnostic?: boolean;
   /**
    * The interruption level for the notification.
    * Possible values: 'passive', 'active', 'timeSensitive', 'critical'