Dependency update release.
* This release updates code to account for changes in `deriva-py` dependency APIs.
* Complete change list [here](https://github.com/informatics-isi-edu/deriva-catalog-manage/compare/v0.7.0...v0.8.0).
Change lists for previous releases can be found on the GitHub releases
page [here](https://github.com/informatics-isi-edu/deriva-catalog-manage/releases).