This is the first major release of 2021. It includes:
- Adding the empirical models IGRF, IRI2016, MSISE00
- Upgrading the versions of the installed packages in py38
- Adding pysat, xarray, and ommbv
- Updating to jupyterlab3, using prebuilt extensions that don't need npm and nodejs
- Updating documentation to give a more detailed description of resen-core