[common] binary message in ws connection

src/common/haxe/ru/m/connect/neko/NekoConnection.hx

@@ -1,6 +1,5 @@
 package ru.m.connect.neko;
 
-import haxe.io.BytesOutput;
 import protohx.Message;
 import sys.net.Socket;
 
@@ -19,9 +18,7 @@ class NekoConnection<O:Message, I:Message> extends BaseConnection<O, I> {
 
     private function _send(packet:O):Void {
         try {
-            var b = new BytesOutput();
-            packet.writeTo(b);
-            var bytes = b.getBytes();
+            var bytes = PacketUtil.toBytes(packet);
             socket.output.writeUInt16(bytes.length);
             socket.output.write(bytes);
             socket.output.flush();