fix: resolve event emitter not emitting because of missing call to setChanged

src/main/java/uulm/teamname/marvelous/gamelibrary/gamelogic/GameInstance.java

@@ -83,10 +83,10 @@ public class GameInstance {
     }
 
     /**
-     * Emits an array of {@link Event}s.
+     * Instructs the emitter to emit an array of {@link Event}s.
      * @param events The events to emit
      */
     private void emit(Event... events) {
-        emitter.notifyObservers(events);
+        emitter.update(events);
     }
 }