Improve imp._FileLike.__exit__

The signature of this method currently doesn't work quite as intended: see PyCQA/flake8-pyi#199 (comment)

Classes will [still be accepted](https://mypy-play.net/?mypy=latest&python=3.10&gist=77efe095d01edeb1a4614166f0c9cf68) as conforming to this protocol if they have more permissive signatures such as `def __exit__(self, *args: object) -> None: ...`

Author: AlexWaygood

stdlib/imp.pyi

@@ -1,6 +1,7 @@
 import types
 from _typeshed import StrPath
 from os import PathLike
+from types import TracebackType
 from typing import IO, Any, Protocol
 
 from _imp import (
@@ -45,7 +46,7 @@ class _FileLike(Protocol):
     def read(self) -> str | bytes: ...
     def close(self) -> Any: ...
     def __enter__(self) -> Any: ...
-    def __exit__(self, *args: Any) -> Any: ...
+    def __exit__(self, typ: type[BaseException] | None, exc: BaseException | None, tb: TracebackType | None) -> Any: ...
 
 # PathLike doesn't work for the pathname argument here
 def load_source(name: str, pathname: str, file: _FileLike | None = ...) -> types.ModuleType: ...