Fix CI checks and Python 3.8 tests

Author: rmk135

examples/.pydocstylerc

@@ -1,2 +1,2 @@
 [pydocstyle]
-ignore = D100,D101,D102,D103,D105,D107,D203,D213
+ignore = D100,D101,D102,D103,D105,D107,D203,D213,F821

src/dependency_injector/wiring.py

@@ -1027,7 +1027,7 @@ def _patched(*args, **kwargs):
     return cast(F, _patched)
 
 
-def _get_members_and_annotated(obj: Any) -> list[tuple[str, Any]]:
+def _get_members_and_annotated(obj: Any) -> Iterable[tuple[str, Any]]:
     members = inspect.getmembers(obj)
     try:
         annotations = inspect.get_annotations(obj)