Update the protocol since the networking layer has changed significantly.

When I put up a public server, this will prevent older clients from connecting.

Author: pspeed42

sim-eth-basic/src/main/java/example/GameConstants.java

@@ -52,7 +52,7 @@
 public class GameConstants {
 
     public static final String GAME_NAME = "SimEtheral Example";
-    public static final int PROTOCOL_VERSION = 42;
+    public static final int PROTOCOL_VERSION = 43;
     public static final int DEFAULT_PORT = 4269;
 
     /**