added TimeoutMessage

wizard-client/wizard-client-cli/src/main/java/eu/jonahbauer/wizard/client/cli/state/Game.java

@@ -149,6 +149,8 @@ public final class Game extends BaseState {
                             LocalDateTime.ofInstant(Instant.ofEpochMilli(input.getTimeout()), ZoneId.systemDefault())
                     );
                 }
+            } else if (observerMessage instanceof TimeoutMessage) {
+                client.println("Timed out.");
             } else {
                 throw new AssertionError("Unknown observer message " + observerMessage.getClass().getSimpleName() + "");
             }