* Remove intermediate CoverM files when done
* Update SingleM environment to latest version (Python 3.9, default metapackage via zenodo)
* Add support for metapackage via SINGLEM_METAPACKAGE_PATH environment variable (see SingleM data)
**Full Changelog**: https://github.com/AroneyS/cockatoo/compare/v0.4.0...v0.4.1