`async_to_sync' is not wrapped properly:

For now, I'm using this approach, which should be in the `asgiref`:
```python
import functools
...

from asgiref.sync import async_to_sync as _async_to_sync
...

def async_to_sync(awaitable: Callable[P, Coroutine[Any, Any, T]]) -> Callable[P, T]:
    return functools.wraps(awaitable)(_async_to_sync(awaitable))
```