fix: reset turnCount at the beginning of a new round

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

@@ -381,6 +381,7 @@ class GameLogic {
      * Verifies that a {@link Character} is alive.
      */
     private static void requireAlive(Character entity) throws InvalidRequestException {
+        //TODO: only characters are allowed here
         if(entity.hp.getValue() <= 0 || !entity.isActive()) {
             throw new InvalidRequestException();
         }
@@ -607,6 +608,7 @@ class GameLogic {
         ArrayList<Event> result = new ArrayList<>();
 
         state.roundNumber++;
+        state.turnNumber = 0;
 
         if(state.roundNumber >= 1 && state.roundNumber <= 6) {
             result.addAll(handleGoose(state));