feat: add upgrade tower (non gui)

src/game/Towers.cpp

@@ -109,7 +109,9 @@ const std::map<std::pair<TowerType, TowerLevel>, TowerStats> TowerConstants = {
 };
 
 const TowerStats* getTowerStats(TowerType type, TowerLevel level) {
-    return &TowerConstants.at({ type, level });
+    auto it = TowerConstants.find({type, level});
+    if(it == TowerConstants.end()) return nullptr;
+    return &it->second;
 }
 
 
@@ -238,7 +240,7 @@ void MageTower::tick(std::uint64_t delta, World* world) {
         bool wasTowerActive = false;
         for (MobPtr mob : world->getMobList()) {
             if (isMobInRange(mob)) {
-                mob->addEffect(EffectType::Fire, getLevel().getLevel() * 5, this);
+                mob->addEffect(EffectType::Fire, getLevel().getLevel() * 3, this);
                 wasTowerActive = true;
             }
         }