Add foreground notifications on iOS

Author: Minishlink

README.md

@@ -147,6 +147,8 @@ In `AppDelegate.m`, start Batch:
 * If you use Firebase or another framework swizzling your AppDelegate, follow the [manual integration](https://doc.batch.com/ios/advanced/manual-integration) guide
 * Otherwise, add `[BatchUNUserNotificationCenterDelegate registerAsDelegate];` after the `[RNBatch start:false];` call in your `AppDelegate.m`
 
+If you want to show foreground notifications, add the [relevant configuration](https://doc.batch.com/ios/advanced/customizing-notifications#showing-foreground-notifications-ios-10-only): `[BatchUNUserNotificationCenterDelegate sharedInstance].showForegroundNotifications = true;` after registering the delegate .
+
 <hr>
 
 ## Usage