fix (#212)

Make sure to flush any pending messages before closing the connection.

Author: NoelStephensUnity

Transports/com.community.netcode.transport.facepunch/Runtime/FacepunchTransport.cs

@@ -85,6 +85,8 @@ public override void DisconnectRemoteClient(ulong clientId)
         {
             if (connectedClients.TryGetValue(clientId, out Client user))
             {
+                // Flush any pending messages before closing the connection
+                user.connection.Flush();
                 user.connection.Close();
                 connectedClients.Remove(clientId);