Okay, so apparently with no (clear) announcement from the dev,
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. They mentioned they were working on one, but not that it was actually posted, and they edited it into the post from September 12. FYI, dev, if you're going to post bugfixes, make sure to give them their own Patreon post, or at least edit the post to say it was updated and which parts of the changelog are from 3.0 and which are from 3.0a. When people see that the last post was from September 12, they don't think that it's gonna have an update from more recent than that, especially if the post doesn't say anything about it.
In the new version, it is possible to upgrade the relationship to tier 2 from the mind control menu at Relationship 25, though I haven't playtested anything beyond pressing that button yet.