liquibase: 3.6.0 -> 3.6.1

Semi-automatic update generated by https://github.com/ryantm/nixpkgs-update tools.

This update was made based on information from https://repology.org/metapackage/liquibase/versions.

These checks were done:

- built on NixOS
- Warning: no binary found that responded to help or version flags. (This warning appears even if the package isn't expected to have binaries.)
- found 3.6.1 with grep in /nix/store/h1v590v1y97p0h9l0l7fcqidh3innq8v-liquibase-3.6.1
- directory tree listing: https://gist.github.com/28753639ec583489b9e3164b2c29e0f7