Updated Upstream (Paper)

Upstream has released updates that appear to apply and compile correctly

patches/api/0013-LivingEntity-safeFallDistance.patch

@@ -0,0 +1,31 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: William Blake Galbreath <blake.galbreath@gmail.com>
+Date: Sun, 5 May 2019 12:58:19 -0500
+Subject: [PATCH] LivingEntity safeFallDistance
+
+
+diff --git a/src/main/java/org/bukkit/entity/LivingEntity.java b/src/main/java/org/bukkit/entity/LivingEntity.java
+index 31353bd20404a8c2acf6bf0df524dc3cae324272..e532430b7444cef4e383b3afb637cc6060d8686a 100644
+--- a/src/main/java/org/bukkit/entity/LivingEntity.java
++++ b/src/main/java/org/bukkit/entity/LivingEntity.java
+@@ -910,4 +910,20 @@ public interface LivingEntity extends Attributable, Damageable, ProjectileSource
+      */
+     void setHurtDirection(float hurtDirection);
+     // Paper end
++
++    // Purpur start
++    /**
++     * Gets the distance (in blocks) this entity can safely fall without taking damage
++     *
++     * @return Safe fall distance
++     */
++    float getSafeFallDistance();
++
++    /**
++     * Set the distance (in blocks) this entity can safely fall without taking damage
++     *
++     * @param safeFallDistance Safe fall distance
++     */
++    void setSafeFallDistance(float safeFallDistance);
++    // Purpur end
+ }