I have deployed the liquibase-core karaf feature https://github.com/steinarb/liquibase-karaf-feature to maven central.
The deployed feature has version 3.5.3 and will load liquibase 3.5.3 (and redirect the liquibase logs to the karaf logs).
To load the feature, type the following commands in the karaf console: https://github.com/steinarb/liquibase-karaf-feature#using-liquibase-from-a-karaf-feature
To depend on the liquibase-core feature from a karaf feature file, reference the liquibase-core feature repository before referencing the liquibase-core feature: https://github.com/steinarb/liquibase-karaf-feature#using-liquibase-from-a-karaf-feature