Updated Upstream (Bukkit/CraftBukkit/Spigot)

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:
4b08dbc5 PR-752: Make Leaves Waterlogged
de323fc9 Downgrade dependency version

CraftBukkit Changes:
c3f219edb Fix missing abstract in CraftLeaves
886e6d8c8 SPIGOT-7038: Setting title or subtitle to empty string causes the player to disconnect
6c302a5e3 Make Leaves Waterlogged
53b681be5 Downgrade dependency version

Spigot Changes:
ee737122 Fixed system messages shown in action bar
f343df82 SPIGOT-7036: Don't use CHAT message type
63a06049 SPIGOT-7035: Actionbar Sending in Main Chat

patches/server/0012-Timings-v2.patch

@@ -1877,10 +1877,10 @@ index b0ffa23faf62629043dfd613315eaf9c5fcc2cfe..00000000000000000000000000000000
 -    }
 -}
 diff --git a/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
-index 96011a24045b79ba5bab12aaa308426577d755a2..fba10ca35dc8b38dbab74de967c29c43dc9d62a9 100644
+index 4c939de8822b064f0e44b741c4b3807ba13e5e9e..f43a728eba966992831d040a0ed96f5720d8d15c 100644
 --- a/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
 +++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
-@@ -2286,6 +2286,14 @@ public class CraftPlayer extends CraftHumanEntity implements Player {
+@@ -2288,6 +2288,14 @@ public class CraftPlayer extends CraftHumanEntity implements Player {
  
              CraftPlayer.this.getHandle().connection.send(new net.minecraft.network.protocol.game.ClientboundSystemChatPacket(components, i));
          }