chore: use if TYPE_CHECKING: blocks (#2866)

test/test_0_basic.py

@@ -1,5 +1,6 @@
+from __future__ import annotations
+
 import textwrap
-from pathlib import Path
 
 import packaging.utils
 import pytest
@@ -9,6 +10,10 @@ from cibuildwheel.selector import EnableGroup
 
 from . import test_projects, utils
 
+TYPE_CHECKING = False
+if TYPE_CHECKING:
+    from pathlib import Path
+
 basic_project = test_projects.new_c_project(
     setup_py_add=textwrap.dedent(
         """