Fix implicit return

Author: ppizarror

pygame_menu/widgets/widget/dropselect.py

@@ -845,6 +845,7 @@ def _render(self) -> Optional[bool]:
 
         self._rect.width, self._rect.height = self._surface.get_size()
         self.force_menu_surface_update()
+        return True
 
     def get_index(self) -> int:
         """

pygame_menu/widgets/widget/menubar.py

@@ -482,6 +482,7 @@ def _render(self) -> Optional[bool]:
                     (self._backbox_rect.centerx, self._backbox_rect.bottom - 5),
                     (self._backbox_rect.left + 5, self._backbox_rect.centery)
                 )
+        return True
 
     def set_title(self, title: Any, offsetx: NumberType = 0, offsety: NumberType = 0) -> 'MenuBar':
         """