!sqush fix "Move to dataclass objects"

Author: tony

tests/test_dataclasses.py

@@ -3,9 +3,9 @@
 
 import pytest
 
-from libtmux import Server
 from libtmux._internal.query_list import QueryList
 from libtmux.pane import Pane
+from libtmux.server import Server
 from libtmux.session import Session
 from libtmux.window import Window