More work on refactor to interfaces

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

@@ -8,10 +8,10 @@ namespace PkmnLib.Plugin.Gen7.Scripts.Abilities;
 /// <see href="https://bulbapedia.bulbagarden.net/wiki/Contrary_(Ability)">Bulbapedia - Contrary</see>
 /// </summary>
 [Script(ScriptCategory.Ability, "contrary")]
-public class Contrary : Script
+public class Contrary : Script, IScriptChangeStatBoostChange
 {
     /// <inheritdoc />
-    public override void ChangeStatBoostChange(IPokemon target, Statistic stat, bool selfInflicted, ref sbyte amount)
+    public void ChangeStatBoostChange(IPokemon target, Statistic stat, bool selfInflicted, ref sbyte amount)
     {
         // Invert the stat change
         amount = (sbyte)-amount;