Fixes dupe exception (#258)

- [X] Cleans up ActivatorUtil
- [X] Fixes dupe exception
- [X] Fixes a bug in BasePotion
- [X] Fixes a few possible memory leaks

Bumps release version

Projects/UOContent/Misc/MondainsLegacy.cs

@@ -29,7 +29,9 @@ namespace Server
 
         public static void GiveArtifactTo(Mobile m)
         {
-            if (!(ActivatorUtil.CreateInstance(Artifacts.RandomElement()) is Item item))
+            var item = Artifacts.RandomElement().CreateInstance<Item>();
+
+            if (item == null)
             {
                 return;
             }