Fix accessing window properties (#410)

* Add type hint

* Add magic getter

* Cleanup

Author: simonhamp

src/Events/EventWatcher.php

@@ -12,7 +12,6 @@ public function __construct(protected Client $client) {}
     public function register(): void
     {
         Event::listen('*', function (string $eventName, array $data) {
-
             $event = $data[0] ?? (object) null;
 
             if (! method_exists($event, 'broadcastOn')) {

src/Windows/Window.php

@@ -24,7 +24,7 @@ class Window
 
     protected bool $kiosk = false;
 
-    protected $rememberState = false;
+    protected bool $rememberState = false;
 
     protected bool $alwaysOnTop = false;
 
@@ -362,4 +362,9 @@ public function fromRuntimeWindow(object $window): static
 
         return $this;
     }
+
+    public function __get($var)
+    {
+        return $this->$var ?? null;
+    }
 }