fix: Make context manager __exit__/__aexit__ signatures compatible with typing protocols (#2915)

Author: mxschmitt

playwright/_impl/_async_base.py

@@ -96,9 +96,9 @@ async def __aenter__(self: Self) -> Self:
 
     async def __aexit__(
         self,
-        exc_type: Type[BaseException],
-        exc_val: BaseException,
-        traceback: TracebackType,
+        exc_type: Optional[Type[BaseException]],
+        exc_val: Optional[BaseException],
+        traceback: Optional[TracebackType],
     ) -> None:
         await self.close()
 

playwright/_impl/_sync_base.py

@@ -142,9 +142,9 @@ def __enter__(self: Self) -> Self:
 
     def __exit__(
         self,
-        exc_type: Type[BaseException],
-        exc_val: BaseException,
-        _traceback: TracebackType,
+        exc_type: Optional[Type[BaseException]],
+        exc_val: Optional[BaseException],
+        _traceback: Optional[TracebackType],
     ) -> None:
         self.close()