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:
e28fb3bd SPIGOT-5301: BlockIgniteEvent for campfire + arrow

CraftBukkit Changes:
763e5601 SPIGOT-5294: Cancelled EntityPickupItemEvent and PlayerPickupItemEvent alter on-ground stacks
403ac185 SPIGOT-5301: BlockIgniteEvent for campfire + arrow

Spigot-Server-Patches/PlayerPickupItemEvent-setFlyAtPlayer.patch

@@ -5,7 +5,7 @@ Subject: [PATCH] PlayerPickupItemEvent#setFlyAtPlayer
 
 
 diff --git a/src/main/java/net/minecraft/server/EntityItem.java b/src/main/java/net/minecraft/server/EntityItem.java
-index c0b81223f1..1baff88c4a 100644
+index 27decbd06..17c291569 100644
 --- a/src/main/java/net/minecraft/server/EntityItem.java
 +++ b/src/main/java/net/minecraft/server/EntityItem.java
 @@ -0,0 +0,0 @@ public class EntityItem extends Entity {
@@ -22,6 +22,7 @@ index c0b81223f1..1baff88c4a 100644
                  this.world.getServer().getPluginManager().callEvent(playerEvent);
 +                flyAtPlayer = playerEvent.getFlyAtPlayer(); // Paper
                  if (playerEvent.isCancelled()) {
+                     itemstack.setCount(i); // SPIGOT-5294 - restore count
 +                    // Paper Start
 +                    if (flyAtPlayer) {
 +                        entityhuman.receive(this, i);