Make AttackData polymorphic

src/Library/Attacks/AttackData.hpp

@@ -22,6 +22,7 @@ namespace CreatureLib::Library {
     public:
         AttackData(std::string name, uint8_t type, AttackCategory category, uint8_t power, uint8_t accuracy,
                    uint8_t baseUsage, AttackTarget target, uint8_t priority, std::unordered_set<std::string> flags);
+        virtual ~AttackData() = default;
 
         inline const std::string& GetName() const { return _name; }
         inline const uint8_t GetType() const { return _type; }