You do know the developers are releasing Raft on Steam Early Access on May 23th? Itch.io version won't be updated anymore. You'd known this if you read itch.io game page past year or more:
Raft will be released on Steam Early Access on May 23, 2018, with multiplayer, reefs and much more new content and features! To be notified when it launches, please visit our Steam page and press 'Add to your wishlist'! We are not releasing any new updates on Itch.io as we are working towards a Steam Early Access release. To read more about this announcement, visit our Blog!