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/Loot.cs

@@ -780,7 +780,7 @@ namespace Server
 
             try
             {
-                return ActivatorUtil.CreateInstance(type) as Item;
+                return type.CreateInstance<Item>();
             }
             catch
             {

Projects/UOContent/Misc/LootPack.cs

@@ -1066,7 +1066,7 @@ namespace Server
                 }
                 else
                 {
-                    item = ActivatorUtil.CreateInstance(Type) as Item;
+                    item = Type.CreateInstance<Item>();
                 }
 
                 return item;

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;
             }