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/api/0030-Left-handed-API.patch

@@ -0,0 +1,31 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: BillyGalbreath <blake.galbreath@gmail.com>
+Date: Mon, 30 Nov 2020 06:02:54 -0600
+Subject: [PATCH] Left handed API
+
+
+diff --git a/src/main/java/org/bukkit/entity/Mob.java b/src/main/java/org/bukkit/entity/Mob.java
+index d726453c041a980576312b6bee96a07837f37974..9d4eae5cf0bf8d01954db85b431bcdca8490ee8f 100644
+--- a/src/main/java/org/bukkit/entity/Mob.java
++++ b/src/main/java/org/bukkit/entity/Mob.java
+@@ -64,4 +64,20 @@ public interface Mob extends LivingEntity, Lootable {
+      * @return whether the mob is aware
+      */
+     public boolean isAware();
++
++    // Purpur start
++    /**
++     * Check if Mob is left-handed
++     *
++     * @return True if left-handed
++     */
++    public boolean isLeftHanded();
++
++    /**
++     * Set if Mob is left-handed
++     *
++     * @param leftHanded True if left-handed
++     */
++    public void setLeftHanded(boolean leftHanded);
++    // Purpur end
+ }