Fix jsonparser

SpigotCore_Main/src/de/steamwar/network/handlers/InventoryHandler.java

@@ -40,7 +40,7 @@ public class InventoryHandler extends PacketHandler {
     public static void handleInventoryPacket(InventoryPacket packet) {
         Map<Integer, SWItem> items = new HashMap<>();
         packet.getItems().forEach((i, item) -> {
-            SWItem it = SWItem.getItemFromJson(JsonParser.parseString(item).getAsJsonObject());
+            @SuppressWarnings("deprecation") SWItem it = SWItem.getItemFromJson(new JsonParser().parse(item).getAsJsonObject());
             it.setCallback(click -> NetworkSender.send(InventoryCallbackPacket.builder().owner(packet.getPlayer()).position(i).type(InventoryCallbackPacket.CallbackType.CLICK).clickType(InventoryCallbackPacket.ClickType.getByName(click.name())).build()));
             items.put(i, it);
         });