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/0001-Setup-Gradle-project.patch

@@ -178,7 +178,7 @@ index 0000000000000000000000000000000000000000..139f377673414e1d0213129549e94934
 +}
 diff --git a/pom.xml b/pom.xml
 deleted file mode 100644
-index 64c25fbe8293fd0a963d48c5816ba80dfbb6d412..0000000000000000000000000000000000000000
+index bfdc67dc0956979f0b54fb68c7f213676875f97d..0000000000000000000000000000000000000000
 --- a/pom.xml
 +++ /dev/null
 @@ -1,540 +0,0 @@
@@ -640,7 +640,7 @@ index 64c25fbe8293fd0a963d48c5816ba80dfbb6d412..00000000000000000000000000000000
 -                        <version>3.1.2</version>
 -                        <executions>
 -                            <execution>
--                                <phase>process-classes</phase>
+-                                <phase>test-compile</phase>
 -                                <goals>
 -                                    <goal>check</goal>
 -                                </goals>