Liquibase 4.x has some nice benefits from a Spring Boot perspective. Its scanning and logging infrastructure has been replaced and is now much more fat jar friendly. We should be able to remove much of our customisation and rely on Liquibase's defaults instead.
This upgrade is noteworthy as it's a new major version. https://www.liquibase.org/blog/liquibase-4-0-released contains a little bit of info about the changes and some links to further information.