fix: restore Python 3.7 support

Signed-off-by: Henry Schreiner <henryschreineriii@gmail.com>

cibuildwheel/util.py

@@ -36,7 +36,8 @@ from packaging.utils import parse_wheel_filename
 from packaging.version import Version
 from platformdirs import user_cache_path
 
-from cibuildwheel.typing import Final, Literal, PathOrStr, PlatformName
+from ._compat.functools import cached_property
+from ._compat.typing import Final, Literal, PathOrStr, PlatformName
 
 __all__ = [
     "resources_dir",
@@ -661,12 +662,6 @@ def find_compatible_wheel(wheels: Sequence[T], identifier: str) -> T | None:
     return None
 
 
-if sys.version_info >= (3, 8):
-    from functools import cached_property
-else:
-    from .functools_cached_property_38 import cached_property
-
-
 # Can be replaced by contextlib.chdir in Python 3.11
 @contextlib.contextmanager
 def chdir(new_path: Path | str) -> Generator[None, None, None]: