Updated Upstream (Bukkit/CraftBukkit)

Upstream has released updates that appears to apply and compile correctly.
This update has not been tested by PaperMC and as with ANY update, please do your own testing

Bukkit Changes:
e461dcfe #555: Item - add getters/setters for owner/thrower

CraftBukkit Changes:
055870c4 #758: Item - add getters/setters for owner/thrower

Spigot-API-Patches/0169-Add-WhitelistToggleEvent.patch

@@ -0,0 +1,52 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Mark Vainomaa <mikroskeem@mikroskeem.eu>
+Date: Wed, 13 Mar 2019 20:04:43 +0200
+Subject: [PATCH] Add WhitelistToggleEvent
+
+
+diff --git a/src/main/java/com/destroystokyo/paper/event/server/WhitelistToggleEvent.java b/src/main/java/com/destroystokyo/paper/event/server/WhitelistToggleEvent.java
+new file mode 100644
+index 0000000000000000000000000000000000000000..fdd5eedb2b7401439912a3a4343a920f32edc860
+--- /dev/null
++++ b/src/main/java/com/destroystokyo/paper/event/server/WhitelistToggleEvent.java
+@@ -0,0 +1,40 @@
++package com.destroystokyo.paper.event.server;
++
++import org.bukkit.event.Event;
++import org.bukkit.event.HandlerList;
++import org.jetbrains.annotations.NotNull;
++
++/**
++ * This event is fired when whitelist is toggled
++ *
++ * @author Mark Vainomaa
++ */
++public class WhitelistToggleEvent extends Event {
++    private static final HandlerList handlers = new HandlerList();
++
++    private boolean enabled;
++
++    public WhitelistToggleEvent(boolean enabled) {
++        this.enabled = enabled;
++    }
++
++    /**
++     * Gets whether whitelist is going to be enabled or not
++     *
++     * @return Whether whitelist is going to be enabled or not
++     */
++    public boolean isEnabled() {
++        return enabled;
++    }
++
++    @NotNull
++    @Override
++    public HandlerList getHandlers() {
++        return handlers;
++    }
++
++    @NotNull
++    public static HandlerList getHandlerList() {
++        return handlers;
++    }
++}