Give ExecutingAttack a virtual destructor.

src/Battling/Models/ExecutingAttack.hpp

@@ -67,6 +67,7 @@ namespace CreatureLib::Battling {
         LearnedAttack* _attack;
         Script* _script;
     public:
+        virtual ~ExecutingAttack() = default;
 
         TargetData& GetAttackDataForTarget(Creature* creature){
             return _targets[creature];