space-physics/geomagindices: new source of recent Ap, f10.7 data, Python >= 3.7

SWPC obseleted their source of recent data. As a result, we have to get Ap and f10.7 from two discrete web sources. This was a long-term pain point that has been resolved in this release. Part of the release also needs Python >= 3.7 to make this package reliable across Python install mechanisms, including venv and non-CPython installs.