Updated Upstream (Paper)

Upstream has released updates that appear to apply and compile correctly

Paper Changes:
0514fc4e2 Add missing effects
8f5d9effd Add getMainThreadExecutor to BukkitScheduler
313b5020b Allow adding items to BlockDropItemEvent (#5093)
9a556d9da [CI-SKIP] [Auto] Rebuild Patches
72b2768ad Inline shift fields in EnumDirection (#5082)
ffff53fa7 added option to disable pathfinding updates on block changes (#5123)
b67081fd7 add DragonEggFormEvent (fixes #5110) (#5112)
3eefafbaf Fix javadoc build
0081ed1c4 Add javadoc step to GH Actions
01082503e Add dropLeash variable to EntityUnleashEvent (#5130)
31f9f869a [CI-SKIP] Fix YourKit links in readme, fixes #5091
8ac27aa38 [Auto] Updated Upstream (CraftBukkit)
c4d9cc831 [Auto] Updated Upstream (Bukkit/CraftBukkit)
d0477d326 [Auto] Updated Upstream (CraftBukkit)
d9f5f7018 EntityMoveEvent (#4614)

patches/server/0124-Arrows-should-not-reset-despawn-counter.patch

@@ -0,0 +1,21 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: William Blake Galbreath <Blake.Galbreath@GMail.com>
+Date: Wed, 4 Nov 2020 13:12:50 -0600
+Subject: [PATCH] Arrows should not reset despawn counter
+
+This prevents keeping arrows alive indefinitely (such as when the block
+the arrow is stuck in gets removed, like a piston head going up/down)
+
+diff --git a/src/main/java/net/minecraft/server/EntityArrow.java b/src/main/java/net/minecraft/server/EntityArrow.java
+index 74529a297540ea9c69952d88fe3bb5a13816dcef..2e11286e2baffa66bea9570b0377478cd45fac1e 100644
+--- a/src/main/java/net/minecraft/server/EntityArrow.java
++++ b/src/main/java/net/minecraft/server/EntityArrow.java
+@@ -245,7 +245,7 @@ public abstract class EntityArrow extends IProjectile {
+         Vec3D vec3d = this.getMot();
+ 
+         this.setMot(vec3d.d((double) (this.random.nextFloat() * 0.2F), (double) (this.random.nextFloat() * 0.2F), (double) (this.random.nextFloat() * 0.2F)));
+-        this.despawnCounter = 0;
++        // this.despawnCounter = 0; // Purpur - do not reset despawn counter
+     }
+ 
+     @Override