Cannot retrieve entity from ID

修复该报错，请安装最新的 ProtocolLib​

[ItemsAdder] Unhandled exception occured in onPacketReceiving(PacketEvent) for ItemsAdder
java.lang.RuntimeException: Cannot retrieve entity from ID.
	at com.comphenix.protocol.wrappers.BukkitConverters$9.getSpecific(BukkitConverters.java:646) ~[?:?]
	at com.comphenix.protocol.wrappers.BukkitConverters$9.getSpecific(BukkitConverters.java:625) ~[?:?]
	at com.comphenix.protocol.reflect.StructureModifier.readInternal(StructureModifier.java:227) ~[?:?]
	at com.comphenix.protocol.reflect.StructureModifier.read(StructureModifier.java:195) ~[?:?]
	at dev.lone.itemsadder.Spigot.SpigotEntityFix$1.onPacketReceiving(Unknown Source) ~[?:?]
	at com.comphenix.protocol.injector.SortedPacketListenerList.invokeReceivingListener(SortedPacketListenerList.java:114) ~[?:?]
	at com.comphenix.protocol.injector.SortedPacketListenerList.invokePacketRecieving(SortedPacketListenerList.java:67) ~[?:?]
	at com.comphenix.protocol.injector.PacketFilterManager.handlePacket(PacketFilterManager.java:590) ~[?:?]
	at com.comphenix.protocol.injector.PacketFilterManager.invokePacketRecieving(PacketFilterManager.java:557) ~[?:?]
	at com.comphenix.protocol.injector.netty.ProtocolInjector.packetReceived(ProtocolInjector.java:352) ~[?:?]
	at com.comphenix.protocol.injector.netty.ProtocolInjector.onPacketReceiving(ProtocolInjector.java:317) ~[?:?]
​