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/Server/Regions/RegionLoader.cs

@@ -46,7 +46,7 @@ namespace Server
                     continue;
                 }
 
-                var region = ActivatorUtil.CreateInstance(type, json, JsonConfig.DefaultOptions) as Region;
+                var region = type.CreateInstance<Region>(json, JsonConfig.DefaultOptions);
                 region?.Register();
                 count++;
             }