Add keyword arguments for AsyncSession.connection (#220)

In SQLAlchemy 1.4.24, `AsyncSession.connection` started accepting keyword arguments which would be passed through to the underlying connection

https://github.com/sqlalchemy/sqlalchemy/blob/main/lib/sqlalchemy/ext/asyncio/session.py#L740-L755

Author: chrisguidry

sqlalchemy-stubs/ext/asyncio/session.pyi

@@ -157,7 +157,7 @@ class _AsyncSessionTypingCommon(
     def begin_nested(self, **kw: Any) -> AsyncSessionTransaction: ...
     async def close(self) -> None: ...
     async def commit(self) -> None: ...
-    async def connection(self) -> AsyncConnection: ...
+    async def connection(self, **kw: Any) -> AsyncConnection: ...
     async def delete(self, instance: Any) -> None: ...
     async def execute(
         self,