Changelog for Update 1.3.1 (added 19 July 2018):

* Improved controller prompt images
* Controller button images shown in settings instead of names
* Option to use Nintendo Switch button prompts
* Inventory button now defaults to Y / Triangle on controllers
* Chance of starting with an experimental weapon in dailies
* New daily traits!
* Super fun blur effect on pause menu
* Magic Bomb Blessing now creates projectiles from more sources, and the number of projectiles is based on the size of the explosion
* Controller rumble for Xbox controllers (option to reduce/disable in settings)
* Fixed Medusa not triggering when jellies are turned in to chickens
* Fixed pressing B on leaderboards menu closing & reopening on game over screen
* Fixed some fonts being cut off
* Should fix vsync-related performance issues people were having

Changelog for Update 1.3.1d (added 16 August 2018):

* Fixed mini kullos not being stunable
* Extended modifier life if the target enters a door
* Twilight relic corruption is slightly slower
* Twilight relic increases the amount of treasure on each level
* Fixed missing tiki grubs & cave trolls

Changelog for Update 1.3.1e (added 23 August 2018):

* Inventory panel autosize improvements
* Journal item panel autosizing
* Improvements to some language spacing
* Improved Russian font from ZoG
* Date is now translatable
* Fixed some prompts not updating with language change

Changelog for Update 1.4.0 (added 16 October 2018):

* Arena Mode now has an ending
* Bosses have more knockback resistance
* The ceiling in Deathrig's arena is no longer phantom-y
* Gold pickup text combines a little better
* Fixed interluder permanently stunning enemies
* Improvements to dynamic split screen
* Bludgeon Card in the Arena also causes you to take damage when losing a shield

Changelog for Update v1.5.0 (18 December 2019):

- Make your own hats!
- Arena cards have been reworked & improved
- New items, blessings and cards
- New daily traits
- New challenges
- New stuff in the outfitter
- Homing arrows now work with lightning-based attacks
- Ricochet arrows now work with the Trident Shot
- Golden perk ticks for completing the game with all relics active, and a bonus cosmetic item for completing them all
- Return a throwable item back to your inventory by pressing an empty slot, or a stack
- Nearby non-friendly characters also follow you to new levels
- Demonic Prayer Beads have a range indication when charged
- Reduced amount healed from the "Heal Before Bosses" daily trait
- Blessing Choices should no longer have duplicate blessings in them
- Some damage numbers are different colours based on damage type
- You can no longer collect more than 5 of a single arena card
- When rare enemies spawn, they now always drop an item
- Using the Resurrection Wisp in multiplayer no longer causes the target to lose half their items & blessings
- Fixed Blood Shrines sometimes not costing 5 with the Brimstone Perk
- Fixed Bullseye Blessing not working with magic or bomb based weapons
- Fixed purple slime eyes falling through the ground

Standalone installer, and that of its DLC, updated: 1.4.3 ⇒ 1.5.0a.

Changelog entry in the library says 18 December 2018. Your correction, or a transcription error?

Sorry for the late reply.

I made the correction after checking the timeline of updates. I've seen changelogs list the wrong year a few times, probably due to copy/paste.

Happy holidays.

No problem. I did a very cursory search before I posted that, and I couldn't find anywhere where there was a straight-up changelog with version number, so I really wasn't sure. It would hardly have been the first time that an update arrived here that long after its release elsewhere.
"Late" or not, thanks for the reply. :) And merry [late-calendar-year holiday of your choosing]!

Unfortunately that's very true. In this case, however, based on the timeline of updates on Steam, this one was definitely released in December 2019.

Changelog for Update v1.5.2a (10 July 2020):

- Fixed Fury Blessing staying active when dealing damage with active items
- Fixed Poison Affinity Blessing not working on certain bosses
- Fixed 'Established' Challenge completing after 3 daily runs instead of 5
- Fixed 'Battleground' daily trait sometimes blocking level
- Fixed error when trying to return Grinder to inventory
- Fixed Fury Blessing vs Weakspot error
- Fixed issue when throwing a bomb directly upwards while at the top of an ascension field
- Fixed error occuring with Vortex Perk and Regeneration Blessing
- Fixed Toxin Card not working


Standalone installer, and that of its DLC, updated: 1.5.0a ⇒ v1.5.2a.