providing socket info for keyboard events

nicegui/elements/keyboard.py

@@ -55,7 +55,13 @@ class Keyboard(Element):
                 code=msg.key_data.code,
                 location=msg.key_data.location,
             )
-            arguments = KeyEventArguments(sender=self, action=action, modifiers=modifiers, key=key)
+            arguments = KeyEventArguments(
+                sender=self,
+                socket=msg.websocket,
+                action=action,
+                modifiers=modifiers,
+                key=key
+            )
             return handle_event(self.key_handler, arguments, update=self.parent_view)
         except Exception:
             traceback.print_exc()