All shop items are now spawned with packets and reflection client-side, so probably duplicated items are history (finally). This also allowed me to remove the ClearLag and LWC dependency, as ClearLag can't remove client-side items and LWC's Magnet Sucker can't suck them inside a chest. I also changed a bit in the classes of the nms package, so all required classes have to be found before attempting to do anything.
Fixes#11 and fixes#4
If another plugin cancelled the PlayerInteractEvent before ShopChest, the player is not permitted to create a shop on the clicked chest. The dependency of 'Lockette' is no longer needed. It might occur that a plugin, which is not used for protections, cancels the PlayerInteractEvent so a shop cannot be created.
This closes#14
