Allow slicing of BaseRowProxy

Signed-off-by: Anders Kaseorg <[email protected]>

Author: andersk

sqlalchemy-stubs/engine/result.pyi

@@ -16,7 +16,7 @@ class BaseRowProxy(Mapping[str, Any]):
     def values(self): ...
     def __iter__(self): ...
     def __len__(self) -> int: ...
-    def __getitem__(self, key: Union[str, int, Column]) -> Any: ...
+    def __getitem__(self, key: Union[str, int, slice, Column]) -> Any: ...
     def __getattr__(self, name): ...
 
 class RowProxy(BaseRowProxy):