chore: use if TYPE_CHECKING: blocks (#2866)

test/test_build_frontend_args.py

@@ -1,10 +1,15 @@
+from __future__ import annotations
+
 import subprocess
-from pathlib import Path
 
 import pytest
 
 from . import test_projects, utils
 
+TYPE_CHECKING = False
+if TYPE_CHECKING:
+    from pathlib import Path
+
 
 @pytest.mark.parametrize(
     "frontend_name",