I recall seeing some updates on the Steam version of the game a while back, think it might've been a Christmas event so it's been a while, but the last update on the itch version seems to have been back in November, is the itch version just not updated along with the Steam version?
Edit: Just checked and it looks like there was an update for valentines day as well over on Steam. While it doesn't look like there's been anything here for PCs.