Feature request

Feature description

Making the plugin compatible with wildstacker (https://www.spigotmc.org/resources/%E2%9A%A1%EF%B8%8F-wildstacker-%E2%9A%A1%EF%B8%8F-spawners-entities-drops-blocks-%E2%9A%A1%EF%B8%8F-custom-spawn-conditions.60648/)

How the feature is useful

Stacking items is a very common feature nowadays to avoid lag and compatibility would be greatly appreciated (currently when stacked items are catched by a bag it only stores 1 item)