Make reference public

Author: andreascreten

src/Facades/Notification.php

@@ -8,6 +8,7 @@
  * @method static static title(string $title)
  * @method static static event(string $event)
  * @method static static message(string $body)
+ * @method static static reference(string $reference)
  * @method static void show()
  */
 class Notification extends Facade

src/Notification.php

@@ -6,7 +6,7 @@
 
 class Notification
 {
-    protected ?string $reference = null;
+    public ?string $reference = null;
 
     protected string $title;