To get this update, you have to opt in inside your library:
Necesse -> Properties -> Betas -> Select 0.20.x in dropdown.
This update brings interface sizing, a new boss and a bunch of content mainly focused on the desert biome/cave. If you don't want any spoilers, I recommend to stop reading here and just find a new desert cave to explore!
Here's a small teaser of where you can find the new boss:
Added interface size setting.
Added snow and swamp variations of crates.
Added vases to desert caves.
Added Sand Spirit mob to desert caves.
Added Mummy Mage mob to desert caves.
Added Heavy Hammer weapon, can be found in cave chests.
Added Ancient Feather trinket, found in desert cave chests.
Added Mining Charm trinket, found in desert cave chests.
Added Cactus Shield trinket, found in desert cave chests.
Added quartz ore to desert caves, must be mined with demonic pickaxe.
Added quartz armor set, can be crafted at demonic workstation.
Added new boss. Summon item can be crafted using quartz, found in desert cave chests or dropped from desert mobs.
Added Quartz Staff magic weapon, crafted at demonic workstation.
Added Vulture Staff, dropped from new boss.
Added Vultures Burst, dropped from new boss.
Added Vultures Talon, dropped from new boss.
Added Magical Quiver trinket, bought from hunter after new boss.
When trying to mine something you cant, you will now hear a "dink".
Increased damage of mummy mob.
Changed attack speed buff tip to be more intuitive.
Reduced damage of flintlock pistol.
Increased damage of genie lamp weapon.
Items will now never despawn, instead there's a limit of 500 per map.
Increased arrow stack size to 1000.
Fixed cave chests rooms sometimes overlapping.
Fixed sorting of full inventory deleting last item.
Fixed missing swampgrass locale key.
Fixed weapon enchantments not working.
Fixed health number flickering during regeneration.
Fixed sounds sometimes not playing when they're being played elsewhere.
Fixed sounds rarely playing really loud.
This update also includes a bunch of fixes from the main branch.
And a bunch of other minor changes and fixes.
You might have to restart Steam to get the update.
Note: Will you have to generate new caves for the new generation to show up