Describe the bug

Connection loss is never detected by receive_json().

Providing a timeout parameter to ws.receive_json() doesn't help any.

To Reproduce

  async with AsyncClient() as client:
      async with aconnect_ws(self._uri, client, keepalive_ping_timeout_seconds=None) as ws:
          while ws.connection.state is ConnectionState.OPEN:
              await ws.receive_json()

Expected behavior

When connection is lost, ws.receive*() raises an error and the async context manager calls __aexit__.