Updated Upstream (Bukkit/CraftBukkit) (#8430)

Upstream has released updates that appear to apply and compile correctly.
This update has not been tested by PaperMC and as with ANY update, please do your own testing

Bukkit Changes:
09943450 Update SnakeYAML version
5515734f SPIGOT-7162: Incorrect description for Entity#getVehicle javadoc
6f82b381 PR-788: Add getHand() to all relevant events

CraftBukkit Changes:
aaf484f6f SPIGOT-7163: CraftMerchantRecipe doesn't copy demand and specialPrice from BukkitMerchantRecipe
5329dd6fd PR-1107: Add getHand() to all relevant events
93061706e SPIGOT-7045: Ocelots never spawn with babies with spawn reason OCELOT_BABY

patches/server/0707-Log-when-the-async-catcher-is-tripped.patch

@@ -0,0 +1,20 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Spottedleaf <Spottedleaf@users.noreply.github.com>
+Date: Wed, 25 Aug 2021 20:17:12 -0700
+Subject: [PATCH] Log when the async catcher is tripped
+
+The chunk system can swallow the exception given it's all
+built with completablefuture, so ensure it is at least printed.
+
+diff --git a/src/main/java/org/spigotmc/AsyncCatcher.java b/src/main/java/org/spigotmc/AsyncCatcher.java
+index 5409f230fdd53b70fc03c58177438534731ad4e6..c02a04d284734b5f545b64307ed4aea337c1465f 100644
+--- a/src/main/java/org/spigotmc/AsyncCatcher.java
++++ b/src/main/java/org/spigotmc/AsyncCatcher.java
+@@ -12,6 +12,7 @@ public class AsyncCatcher
+     {
+         if ( !io.papermc.paper.util.TickThread.isTickThread() ) // Paper // Paper - rewrite chunk system
+         {
++            MinecraftServer.LOGGER.error("Thread " + Thread.currentThread().getName() + " failed main thread check: " + reason, new Throwable()); // Paper
+             throw new IllegalStateException( "Asynchronous " + reason + "!" );
+         }
+     }