Updated Upstream (Paper, Tuinity, & Airplane)

Upstream has released updates that appear to apply and compile correctly

Paper Changes:
8a29f5894 [Auto] Updated Upstream (Bukkit/CraftBukkit)
8756d232c Expose server protocol version (#5416)
4492bc4cc remove l4j class no longer in existence from preload list
be1370517 Updated Upstream (CraftBukkit) (#5484)
d560151ec Bump mysql-connector-java to 8.0.23 (Fixes #5473) (#5474)
61f400f11 Update log4j to 2.11.2 for JDK 9+ compat (#5400)
a98196585 Updated Upstream (Bukkit/CraftBukkit)
de138fac4 [Auto] Updated Upstream (Bukkit)
304a216ba [CI-SKIP] Ignore gitignore when adding files in automation
d8e384a16 [CI-SKIP] Drop `Allow PlayerEditBookEvent to fire for off hand` (#5471)

Tuinity Changes:
d5261ad29 Do not load chunks for getCubes by default
da9cf9828 Don't read neighbor chunk data off disk when converting chunks
a0aa5ab07 Do not load 1 radius neighbors for lighting
5ccfa52a2 Fix terrible patch times
af53d703a Stop large move vectors in player packet handling from killing the server
6e56ee735 Fix OBFHELPER for flushHeaderin RegionFile
995d05c1c Do not update TE's in generating chunks

Airplane Changes:
8de8e82a2 Update upstream (Tuinity)

patches/api/0038-Add-unsafe-Entity-serialization-API.patch

@@ -17,12 +17,12 @@ You should have received a copy of the GNU General Public License
 along with this program.  If not, see <https://www.gnu.org/licenses/>.
 
 diff --git a/src/main/java/org/bukkit/UnsafeValues.java b/src/main/java/org/bukkit/UnsafeValues.java
-index 85f77a58bf6c21da815b6652c7b50d578951a14c..59a91250d80e6f67a32cb4c7a216f1389338ddbf 100644
+index db4b94f8a4dd49fffdcb0cd9bf0690f0770653d9..bca389b75ed072ec95beb7a5c5eb5ac93ce42ecd 100644
 --- a/src/main/java/org/bukkit/UnsafeValues.java
 +++ b/src/main/java/org/bukkit/UnsafeValues.java
-@@ -152,4 +152,28 @@ public interface UnsafeValues {
+@@ -159,4 +159,28 @@ public interface UnsafeValues {
       */
-     public io.papermc.paper.inventory.ItemRarity getItemStackRarity(ItemStack itemStack);
+     int getProtocolVersion();
      // Paper end
 +
 +    // Purpur start