The recent announcements and change of licenses for Liquibase 5.x is problematic, not just the fact that the license is changing to a source available from a open source license, but also the limited amount of time between the announcement and the license changes being pushed.
The source available license means that many projects will no longer be able to use Liquibase. For example Keycloak will not be able to continue to use Liquibase and we will need to find an alternative.
I would urge to re-consider this approach, or at the very least commit to maintaining Liquibase 4.x for some period of time to accommodate anyone caught of guard by this some time to find alternatives.