prepare for 1.21.3 update

patches/unapplied-api/0036-Add-local-difficulty-api.patch

@@ -0,0 +1,27 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: BillyGalbreath <blake.galbreath@gmail.com>
+Date: Sat, 9 Jul 2022 00:57:26 -0500
+Subject: [PATCH] Add local difficulty api
+
+
+diff --git a/src/main/java/org/bukkit/World.java b/src/main/java/org/bukkit/World.java
+index ef32a937e6faf1e8a5d6b1207986715bae5a246c..24d39c8c449e0ea6175989295d24eee902baec17 100644
+--- a/src/main/java/org/bukkit/World.java
++++ b/src/main/java/org/bukkit/World.java
+@@ -4209,6 +4209,16 @@ public interface World extends RegionAccessor, WorldInfo, PluginMessageRecipient
+     @Nullable
+     public DragonBattle getEnderDragonBattle();
+ 
++    // Purpur start
++    /**
++     * Gets the local difficulty (based on inhabited time) at a location
++     *
++     * @param location Location to check
++     * @return The local difficulty
++     */
++    public float getLocalDifficultyAt(@NotNull Location location);
++    // Purpur end
++
+     /**
+      * Get all {@link FeatureFlag} enabled in this world.
+      *