Create `repodata.json` for collections of conda packages.
https://anaconda.org/conda/conda-index/badges/version.svg
https://anaconda.org/conda/conda-index/badges/latest_release_date.svg
https://anaconda.org/conda/conda-index/badges/latest_release_relative_date.svg
https://anaconda.org/conda/conda-index/badges/platforms.svg
https://anaconda.org/conda/conda-index/badges/license.svg
https://anaconda.org/conda/conda-index/badges/downloads.svg