Add a destructor

src/gamestate.cpp

@@ -16,6 +16,11 @@ GameState::GameState(QObject* parent, bool preDealCards) : QObject{parent} {
     }
 }
 
+GameState::~GameState() {
+    qDebug() << "Destroying GameState";
+    cleanupBoard(false);
+}
+
 void GameState::dealCards() {
     qDebug() << "Dealing cards";
     cleanupBoard(false);

src/gamestate.h

@@ -20,6 +20,7 @@ class GameState : public QObject {
 
   public:
     explicit GameState(QObject* parent = nullptr, bool preDealCards = true);
+    ~GameState();
 
     // Getters
     QVariantList drawPile() const;