2 months ago, and you can read the patch notes. If you've been getting your versions elsewhere that might have updated recently... why bother? This is both free and by necessity the most up to date version.
Huh, you're right, It does say it was recently updated.
Given that Kal hasn't announced anything yet makes me suspect it's either some mistake on Itch.io's part, or some very minor bug fix (although, even those he tends to announce)