Prepare for 1.20.3 dev

patches/api/Fix-PlayerSwapHandItemsEvent-throwing-exception-when.patch

@@ -1,47 +0,0 @@
-From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
-From: Tamion <70228790+notTamion@users.noreply.github.com>
-Date: Mon, 25 Sep 2023 19:55:51 +0200
-Subject: [PATCH] Fix PlayerSwapHandItemsEvent throwing exception when mainhand
- or offhand set to null
-
-
-diff --git a/src/main/java/org/bukkit/event/player/PlayerSwapHandItemsEvent.java b/src/main/java/org/bukkit/event/player/PlayerSwapHandItemsEvent.java
-index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
---- a/src/main/java/org/bukkit/event/player/PlayerSwapHandItemsEvent.java
-+++ b/src/main/java/org/bukkit/event/player/PlayerSwapHandItemsEvent.java
-@@ -0,0 +0,0 @@ public class PlayerSwapHandItemsEvent extends PlayerEvent implements Cancellable
-      *
-      * @return item in the main hand
-      */
--    @Nullable
-+    @NotNull // Paper
-     public ItemStack getMainHandItem() {
-         return mainHandItem;
-     }
-@@ -0,0 +0,0 @@ public class PlayerSwapHandItemsEvent extends PlayerEvent implements Cancellable
-      * @param mainHandItem new item in the main hand
-      */
-     public void setMainHandItem(@Nullable ItemStack mainHandItem) {
--        this.mainHandItem = mainHandItem;
-+        this.mainHandItem = mainHandItem == null ? ItemStack.empty() : mainHandItem; // Paper
-     }
- 
-     /**
-@@ -0,0 +0,0 @@ public class PlayerSwapHandItemsEvent extends PlayerEvent implements Cancellable
-      *
-      * @return item in the off hand
-      */
--    @Nullable
-+    @NotNull // Paper
-     public ItemStack getOffHandItem() {
-         return offHandItem;
-     }
-@@ -0,0 +0,0 @@ public class PlayerSwapHandItemsEvent extends PlayerEvent implements Cancellable
-      * @param offHandItem new item in the off hand
-      */
-     public void setOffHandItem(@Nullable ItemStack offHandItem) {
--        this.offHandItem = offHandItem;
-+        this.offHandItem = offHandItem == null ? ItemStack.empty() : offHandItem; // Paper
-     }
- 
-     @Override