Updated Upstream (Bukkit/CraftBukkit/Spigot)

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:
bf1fa3e3 Update to Minecraft 1.15.1

CraftBukkit Changes:
30a1b691 Update to Minecraft 1.15.1
e2790ae2 Remove outdated build delay.

Spigot Changes:
2ee05fef Update to Minecraft 1.15.1

Spigot-Server-Patches/EndermanEscapeEvent.patch

@@ -8,7 +8,7 @@ Fires an event anytime an enderman intends to teleport away from the player
 You may cancel this, enabling ranged attacks to damage the enderman for example.
 
 diff --git a/src/main/java/net/minecraft/server/EntityEnderman.java b/src/main/java/net/minecraft/server/EntityEnderman.java
-index 4519be39ad..60ff027700 100644
+index 1cc66108d..37ca65209 100644
 --- a/src/main/java/net/minecraft/server/EntityEnderman.java
 +++ b/src/main/java/net/minecraft/server/EntityEnderman.java
 @@ -0,0 +0,0 @@ package net.minecraft.server;
@@ -33,7 +33,7 @@ index 4519be39ad..60ff027700 100644
      public boolean setGoalTarget(EntityLiving entityliving, org.bukkit.event.entity.EntityTargetEvent.TargetReason reason, boolean fireEvent) {
          if (!super.setGoalTarget(entityliving, reason, fireEvent)) {
 @@ -0,0 +0,0 @@ public class EntityEnderman extends EntityMonster {
-         if (this.world.J() && this.ticksLived >= this.bA + 600) {
+         if (this.world.isDay() && this.ticksLived >= this.bA + 600) {
              float f = this.aI();
  
 -            if (f > 0.5F && this.world.f(new BlockPosition(this)) && this.random.nextFloat() * 30.0F < (f - 0.4F) * 2.0F) {