message: export SocketMessage reader/writer
diff: @@ -31,8 +31,8 @@ export {
  NotificationMessage, NotificationType,
  NotificationType0, NotificationType1, NotificationType2, NotificationType3, NotificationType4,
  NotificationType5, NotificationType6, NotificationType7, NotificationType8, NotificationType9,
  - MessageReader, DataCallback, StreamMessageReader, IPCMessageReader,
  - MessageWriter, StreamMessageWriter, IPCMessageWriter,
  + MessageReader, DataCallback, StreamMessageReader, IPCMessageReader, SocketMessageReader,
  + MessageWriter, StreamMessageWriter, IPCMessageWriter, SocketMessageWriter,
  CancellationTokenSource, CancellationToken,
  Disposable, Event, Emitter
  }
  