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/0310-Server-Tick-Events.patch

@@ -0,0 +1,31 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Aikar <aikar@aikar.co>
+Date: Wed, 27 Mar 2019 22:48:45 -0400
+Subject: [PATCH] Server Tick Events
+
+Fires event at start and end of a server tick
+
+diff --git a/src/main/java/net/minecraft/server/MinecraftServer.java b/src/main/java/net/minecraft/server/MinecraftServer.java
+index acc9f22a1284cea2e29f3616598f8388f0a0e6f6..f9a96a11764b66709a0d74122f9ecc06d0365a93 100644
+--- a/src/main/java/net/minecraft/server/MinecraftServer.java
++++ b/src/main/java/net/minecraft/server/MinecraftServer.java
+@@ -1302,6 +1302,7 @@ public abstract class MinecraftServer extends ReentrantBlockableEventLoop<TickTa
+         });
+         isOversleep = false;MinecraftTimings.serverOversleep.stopTiming();
+         // Paper end
++        new com.destroystokyo.paper.event.server.ServerTickStartEvent(this.tickCount+1).callEvent(); // Paper
+ 
+         ++this.tickCount;
+         this.tickChildren(shouldKeepTicking);
+@@ -1340,6 +1341,11 @@ public abstract class MinecraftServer extends ReentrantBlockableEventLoop<TickTa
+             this.runAllTasks();
+         }
+         // Paper end
++        // Paper start
++        long endTime = System.nanoTime();
++        long remaining = (TICK_TIME - (endTime - lastTick)) - catchupTime;
++        new com.destroystokyo.paper.event.server.ServerTickEndEvent(this.tickCount, ((double)(endTime - lastTick) / 1000000D), remaining).callEvent();
++        // Paper end
+         this.profiler.push("tallying");
+         long l = this.tickTimes[this.tickCount % 100] = Util.getNanos() - i;
+