Allow RememberTarget to be added to when Single target or other immutable targets are used

Author: Travja

src/main/java/studio/magemonkey/fabled/dynamic/mechanic/RememberTargetsMechanic.java

@@ -30,13 +30,14 @@
 import studio.magemonkey.fabled.api.CastData;
 import studio.magemonkey.fabled.dynamic.DynamicSkill;
 
+import java.util.ArrayList;
 import java.util.List;
 
 /**
  * Applies a flag to each target
  */
 public class RememberTargetsMechanic extends MechanicComponent {
-    private static final String KEY = "key";
+    private static final String KEY       = "key";
     private static final String OVERWRITE = "overwrite";
 
     @Override
@@ -59,17 +60,17 @@ public boolean execute(LivingEntity caster, int level, List<LivingEntity> target
             return false;
         }
 
-        String key = settings.getString(KEY);
-        boolean overwrite = settings.getBool(OVERWRITE, true);
-        CastData castData = DynamicSkill.getCastData(caster);
-        Object rawTargets = castData.getRaw(key);
+        String   key        = settings.getString(KEY);
+        boolean  overwrite  = settings.getBool(OVERWRITE, true);
+        CastData castData   = DynamicSkill.getCastData(caster);
+        Object   rawTargets = castData.getRaw(key);
 
         if (!overwrite && rawTargets instanceof List<?>) {
             @SuppressWarnings("unchecked")
             List<LivingEntity> originalTargets = (List<LivingEntity>) rawTargets;
             originalTargets.addAll(targets);
         } else {
-            castData.put(key, targets);
+            castData.put(key, new ArrayList<>(targets));
         }
         return true;
     }