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/api/0227-Player-elytra-boost-API.patch

@@ -0,0 +1,30 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Trigary <trigary0@gmail.com>
+Date: Tue, 14 Apr 2020 12:06:14 +0200
+Subject: [PATCH] Player elytra boost API
+
+
+diff --git a/src/main/java/org/bukkit/entity/Player.java b/src/main/java/org/bukkit/entity/Player.java
+index 8f7667562187a141ec037eaafa2e3e8d1abd6bff..8d4a010d826fb84feb3d6b927275c49d8eec9f71 100644
+--- a/src/main/java/org/bukkit/entity/Player.java
++++ b/src/main/java/org/bukkit/entity/Player.java
+@@ -2516,6 +2516,19 @@ public interface Player extends HumanEntity, Conversable, OfflinePlayer, PluginM
+      */
+     @NotNull
+     <T> T getClientOption(@NotNull ClientOption<T> option);
++
++    /**
++     * Boost a Player that's {@link #isGliding()} using a {@link Firework}.
++     * If the creation of the entity is cancelled, no boosting is done.
++     * This method does not fire {@link com.destroystokyo.paper.event.player.PlayerElytraBoostEvent}.
++     *
++     * @param firework The {@link Material#FIREWORK_ROCKET} to boost the player with
++     * @return The {@link Firework} boosting the Player or null if the spawning of the entity was cancelled
++     * @throws IllegalArgumentException if {@link #isGliding()} is false
++     * or if the {@code firework} isn't a {@link Material#FIREWORK_ROCKET}
++     */
++    @Nullable
++    Firework boostElytra(@NotNull ItemStack firework);
+     // Paper end
+ 
+     // Spigot start