Updated Upstream (Bukkit/CraftBukkit) (#3980)

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:
09f10fd9 SPIGOT-5950: Add PrepareSmithingEvent event

CraftBukkit Changes:
7c03d257 SPIGOT-6011: End Gateways do not work on Non-Main End Worlds
d492e363 SPIGOT-6015: Small Armor Stand doesn't drop items
5db13eea SPIGOT-5950: Add PrepareSmithingEvent event

Spigot-API-Patches/Add-PrepareResultEvent-PrepareGrindstoneEvent.patch

@@ -5,7 +5,7 @@ Subject: [PATCH] Add PrepareResultEvent / PrepareGrindstoneEvent
 
 Adds a new event for all crafting stations that generate a result slot item
 
-Anvil and Grindstone now extend this event
+Anvil, Grindstone and Smithing now extend this event
 
 Grindstone is a backwards compat from a previous PrepareGrindstoneEvent
 
@@ -153,3 +153,59 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
      }
 +    */ // Paper
  }
+diff --git a/src/main/java/org/bukkit/event/inventory/PrepareSmithingEvent.java b/src/main/java/org/bukkit/event/inventory/PrepareSmithingEvent.java
+index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
+--- a/src/main/java/org/bukkit/event/inventory/PrepareSmithingEvent.java
++++ b/src/main/java/org/bukkit/event/inventory/PrepareSmithingEvent.java
+@@ -0,0 +0,0 @@
+ package org.bukkit.event.inventory;
+ 
++import com.destroystokyo.paper.event.inventory.PrepareResultEvent;
+ import org.bukkit.event.HandlerList;
+ import org.bukkit.inventory.InventoryView;
+ import org.bukkit.inventory.ItemStack;
+@@ -0,0 +0,0 @@ import org.jetbrains.annotations.Nullable;
+ /**
+  * Called when an item is put in a slot for upgrade by a Smithing Table.
+  */
+-public class PrepareSmithingEvent extends InventoryEvent {
++// Paper start - extend PrepareResultEvent
++public class PrepareSmithingEvent extends PrepareResultEvent {
+ 
+-    private static final HandlerList handlers = new HandlerList();
+-    private ItemStack result;
++    //private static final HandlerList handlers = new HandlerList();
++    //private ItemStack result;
+ 
+     public PrepareSmithingEvent(@NotNull InventoryView inventory, @Nullable ItemStack result) {
+-        super(inventory);
+-        this.result = result;
++        super(inventory, result);
++        //this.result = result;
++        // Paper end
+     }
+ 
+     @NotNull
+@@ -0,0 +0,0 @@ public class PrepareSmithingEvent extends InventoryEvent {
+      */
+     @Nullable
+     public ItemStack getResult() {
+-        return result;
++        return super.getResult(); // Paper
+     }
+ 
+     public void setResult(@Nullable ItemStack result) {
+-        this.result = result;
++        super.setResult(result); // Paper
+     }
+ 
++    /* // Paper - comment out
+     @NotNull
+     @Override
+     public HandlerList getHandlers() {
+@@ -0,0 +0,0 @@ public class PrepareSmithingEvent extends InventoryEvent {
+     public static HandlerList getHandlerList() {
+         return handlers;
+     }
++    */ // Paper
+ }