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:
810cb078 Add hideEntity / showEntity API

CraftBukkit Changes:
04f8e7e2 SPIGOT-6814: (Chunk) PersistentData is lost after restart
37fd1917 Add hideEntity / showEntity API
7e2214da Move checkstyle to slightly later compile phase
45c3f826 SPIGOT-6816: Fix ChunkSnapshot#getBiome

Spigot Changes:
b11f318f Rebuild patches
622b2310 SPIGOT-6811: Fix mob spawning mismatch
2b2a3d56 Rebuild patches

patches/server/API-to-get-a-BlockState-without-a-snapshot.patch

@@ -113,13 +113,15 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 --- a/src/main/java/org/bukkit/craftbukkit/persistence/CraftPersistentDataContainer.java
 +++ b/src/main/java/org/bukkit/craftbukkit/persistence/CraftPersistentDataContainer.java
 @@ -0,0 +0,0 @@ public final class CraftPersistentDataContainer implements PersistentDataContain
-     public Map<String, Object> serialize() {
          return (Map<String, Object>) CraftNBTTagConfigSerializer.serialize(this.toTagCompound());
      }
-+
+ 
 +    // Paper start
 +    public void clear() {
 +        this.customDataTags.clear();
 +    }
 +    // Paper end
- }
++
+     @FunctionalInterface
+     public interface Callback {
+         void onValueChange();