chore: use if TYPE_CHECKING: blocks (#2866)

test/test_meson_python.py

@@ -1,9 +1,13 @@
-from pathlib import Path
+from __future__ import annotations
 
 import packaging.utils
 
 from . import test_projects, utils
 
+TYPE_CHECKING = False
+if TYPE_CHECKING:
+    from pathlib import Path
+
 meson_project = test_projects.new_meson_project()