If you use Python a bit, Alembic is a nice one - it's simple and Python is available nearly everywhere.
Alternatively if Liquibase is FSL it will technically be Apache in 2 years I think (not exactly sure how that works) but you could just go to the last non-FSL release and use that for 2 years.
I'm not exactly sure why people would need the most up to datest version of liquibase which just runs schema changes anyway. I used version 2 a bunch of years ago and it was just fine.
Alternatively if Liquibase is FSL it will technically be Apache in 2 years I think (not exactly sure how that works) but you could just go to the last non-FSL release and use that for 2 years.
I'm not exactly sure why people would need the most up to datest version of liquibase which just runs schema changes anyway. I used version 2 a bunch of years ago and it was just fine.