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/api/0004-Add-FastUtil-to-Bukkit.patch

@@ -6,7 +6,7 @@ Subject: [PATCH] Add FastUtil to Bukkit
 Doesn't expose to plugins, just allows Paper-API to use it for optimization
 
 diff --git a/build.gradle.kts b/build.gradle.kts
-index 8372fb4347113bc7dbd1bff738236b388a72e185..c37a91b393c6e64cfe04c7bdd404bc267d1d339e 100644
+index b929458b72f26568b4c87571113eb2f867359312..31cd1ba937c364447e32220ffef1d9ef95b634c6 100644
 --- a/build.gradle.kts
 +++ b/build.gradle.kts
 @@ -18,6 +18,7 @@ dependencies {
@@ -16,4 +16,4 @@ index 8372fb4347113bc7dbd1bff738236b388a72e185..c37a91b393c6e64cfe04c7bdd404bc26
 +    api("it.unimi.dsi:fastutil:8.5.6")
      // Paper end
  
-     compileOnly("org.apache.maven:maven-resolver-provider:3.8.4")
+     compileOnly("org.apache.maven:maven-resolver-provider:3.8.5")