How do I rewrite the code snippet according to this; Setter for 'statusBarStyle' was deprecated in iOS 9.0: Use -[UIViewController preferredStatusBarStyle]
func application(_ application: UIApplication, 
                    didFinishLaunchingWithOptions launchOptions: 
       [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
       FirebaseApp.configure()
       UIApplication.shared.statusBarStyle = .lightContent
        return true
    }
 
    