Fixed an error with diposing of Unlocks class

items.py

@@ -256,7 +256,7 @@ class Chest(GameObject):
                 else:
                     # We need to remove the item if it's an item that destroys itself after use
                     if self.requires.perish_on_open:
-                        self.dispose(None, player)
+                        self.requires.dispose(None, player)
 
             contains_type = type(self.contains)