In that case I only see 2 options, a) pospone the release (actual 9.4.1213) until everything is setup to the 42 change. or b) continue with the actual versioning, and make the change to 42 "when it's ready".
https://github.com/pgjdbc/pgjdbc/pull/611 "feat: allow byte[] and String to be accessed as .getLob, and .getClob" -- test should be reviewed (e.g. assert messages added)