update to a python 3.8 based sandbox
update to a python 3.8 based sandbox

edx/configuration,mitodl/configuration,mitodl/configuration,EDUlib/configuration,EDUlib/configuration,edx/configuration,arbrandes/edx-configuration,EDUlib/configuration,EDUlib/configuration,arbrandes/edx-configuration,edx/configuration,mitodl/configuration,arbrandes/edx-configuration,arbrandes/edx-configuration,arbrandes/edx-configuration,EDUlib/configuration,edx/configuration,mitodl/configuration