Update to Minecraft 1.12-pre6

By: md_5 <git@md-5.net>

paper-server/nms-patches/EntitySilverfish.patch

@@ -3,7 +3,7 @@
 @@ -157,6 +157,11 @@
                  IBlockData iblockdata = world.getType(blockposition);
  
-                 if (BlockMonsterEggs.i(iblockdata)) {
+                 if (BlockMonsterEggs.x(iblockdata)) {
 +                    // CraftBukkit start
 +                    if (org.bukkit.craftbukkit.event.CraftEventFactory.callEntityChangeBlockEvent(this.a, blockposition, Blocks.MONSTER_EGG, Block.getId(BlockMonsterEggs.getById(iblockdata.getBlock().toLegacyData(iblockdata)))).isCancelled()) {
 +                        return;