Add notification test

Author: nojaf

tests/NotificationsAPI/Notification__test.js

@@ -0,0 +1,11 @@
+open WebAPI.NotificationAPI
+
+Notification.requestPermission()
+->Promise.thenResolve(notificationPermission => {
+  switch notificationPermission {
+  | Granted => Console.log("Permission granted")
+  | Denied => Console.log("Permission denied")
+  | Default => Console.log("Permission default")
+  }
+})
+->Promise.done