fix: update method signatures in Menu class to allow nullable labels

Author: SRWieZ

src/Facades/Menu.php

@@ -19,26 +19,26 @@
  * @method static Link route(string $url, string $label = null, ?string $hotkey = null)
  * @method static Radio radio(string $label, bool $checked = false, ?string $hotkey = null)
  * @method static Role app()
- * @method static Role about(string $label = null)
- * @method static Role file(string $label = null)
- * @method static Role edit(string $label = null)
- * @method static Role view(string $label = null)
- * @method static Role window(string $label = null)
- * @method static Role help(string $label = null)
- * @method static Role fullscreen(string $label = null)
+ * @method static Role about(?string $label = null)
+ * @method static Role file(?string $label = null)
+ * @method static Role edit(?string $label = null)
+ * @method static Role view(?string $label = null)
+ * @method static Role window(?string $label = null)
+ * @method static Role help(?string $label = null)
+ * @method static Role fullscreen(?string $label = null)
  * @method static Role separator()
- * @method static Role devTools(string $label = null)
- * @method static Role undo(string $label = null)
- * @method static Role redo(string $label = null)
- * @method static Role cut(string $label = null)
- * @method static Role copy(string $label = null)
- * @method static Role paste(string $label = null)
- * @method static Role pasteAndMatchStyle(string $label = null)
- * @method static Role reload(string $label = null)
- * @method static Role minimize(string $label = null)
- * @method static Role close(string $label = null)
- * @method static Role quit(string $label = null)
- * @method static Role hide(string $label = null)
+ * @method static Role devTools(?string $label = null)
+ * @method static Role undo(?string $label = null)
+ * @method static Role redo(?string $label = null)
+ * @method static Role cut(?string $label = null)
+ * @method static Role copy(?string $label = null)
+ * @method static Role paste(?string $label = null)
+ * @method static Role pasteAndMatchStyle(?string $label = null)
+ * @method static Role reload(?string $label = null)
+ * @method static Role minimize(?string $label = null)
+ * @method static Role close(?string $label = null)
+ * @method static Role quit(?string $label = null)
+ * @method static Role hide(?string $label = null)
  * @method static void create(MenuItem ...$items)
  * @method static void default()
  */