[notifications] Export NotificationPermissions.types

[brentvatne]

Why

This example code from the README currently results in [TypeError: undefined is not an object (evaluating 'Notifications.IosAuthorizationStatus.PROVISIONAL')]:

import * as Notifications from 'expo-notifications';

export async function allowsNotificationsAsync() {
  const settings = await Notifications.getPermissionsAsync();
  return (
    settings.granted || settings.ios?.status === Notifications.IosAuthorizationStatus.PROVISIONAL
  );
}

How

Exported NotificationPermissions.types from index.ts and added a simple check to verify that Notifications.IosAuthorizationStatus is defined when importing from expo-notifications entry point to prevent regression in the future.

Test Plan

Run test included in PR, run the code provided in the "Why" section above.

[github-actions]

Native Component List for this branch is ready

[sjchmiela]

Thank you very much! Would you care to add a changelog entry for this, please? 🙏

[sjchmiela]

10q! 🙏

[hassey13]

Whats the fix for this? I have this issue currently.

[bensalilijames]

Could do this in the meantime:

import * as Notifications from "expo-notifications";
import { IosAuthorizationStatus } from "expo-notifications/build/NotificationPermissions.types";

export async function allowsNotificationsAsync() {
  const settings = await Notifications.getPermissionsAsync();
  return (
    settings.granted || settings.ios?.status === IosAuthorizationStatus.PROVISIONAL
  );
}

[brentvatne]

@hassey - this should be included in the latest release, at the time of writing expo-notifications@0.6.0