More work on refactor to interfaces

Plugins/PkmnLib.Plugin.Gen7/Scripts/Abilities/Defeatist.cs

@@ -7,10 +7,10 @@ namespace PkmnLib.Plugin.Gen7.Scripts.Abilities;
 /// <see href="https://bulbapedia.bulbagarden.net/wiki/Defeatist_(Ability)">Bulbapedia - Defeatist</see>
 /// </summary>
 [Script(ScriptCategory.Ability, "defeatist")]
-public class Defeatist : Script
+public class Defeatist : Script, IScriptChangeDamageModifier
 {
     /// <inheritdoc />
-    public override void ChangeDamageModifier(IExecutingMove move, IPokemon target, byte hit, ref float modifier)
+    public void ChangeDamageModifier(IExecutingMove move, IPokemon target, byte hit, ref float modifier)
     {
         if (move.User.CurrentHealth < move.User.MaxHealth / 2)
         {