fix: minor ruff updates (#1649)

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

cibuildwheel/_compat/typing.py

@@ -3,11 +3,12 @@ from __future__ import annotations
 import sys
 
 if sys.version_info < (3, 11):
-    from typing_extensions import NotRequired, assert_never
+    from typing_extensions import NotRequired, Self, assert_never
 else:
-    from typing import NotRequired, assert_never
+    from typing import NotRequired, Self, assert_never
 
 __all__ = (
     "assert_never",
     "NotRequired",
+    "Self",
 )

cibuildwheel/oci_container.py

@@ -16,6 +16,7 @@ from pathlib import Path, PurePath, PurePosixPath
 from types import TracebackType
 from typing import IO, Dict, Literal
 
+from ._compat.typing import Self
 from .typing import PathOrStr, PopenBytes
 from .util import (
     CIProvider,
@@ -105,7 +106,7 @@ class OCIContainer:
         self.name: str | None = None
         self.engine = engine
 
-    def __enter__(self) -> OCIContainer:
+    def __enter__(self) -> Self:
         self.name = f"cibuildwheel-{uuid.uuid4()}"
 
         # work-around for Travis-CI PPC64le Docker runs since 2021: