Changelog/2019/July 21

As always, these are changes that happened since the last changelog was posted.

• Fixed being asked to and being unable to approve your own invitation when trying to /coopadd a player to a solo profile
• Fixed an exploit with the anvil menu
• Fixed an issue that caused players to get a kick error when trying to join SkyBlock
• Fixed some double tall slabs dropping null blocks when broken with Silk Touch
• Fixed being able to combine items in the anvil that aren’t normally able to be enchanted
• Added a check that deletes null items automatically
• Fixed two issues with Brewing Stands