Updated the library.

api/src/main/java/net/jitse/npclib/internal/PacketHandler.java

@@ -0,0 +1,19 @@
+/*
+ * Copyright (c) 2018 Jitse Boonstra
+ */
+
+package net.jitse.npclib.internal;
+
+import org.bukkit.entity.Player;
+
+/**
+ * @author Jitse Boonstra
+ */
+interface PacketHandler {
+
+    void createPackets();
+
+    void sendShowPackets(Player player);
+
+    void sendHidePackets(Player player, boolean scheduler);
+}