20.1.0 got tagged on GitHub in February and added to Gentoo in mid-March, however it was not clear for a while whether it was a pre-release or not. Now that it has been both marked as latest release there (with the same source tarball as before) and listed on PyPI, I think it's safe to proceed with stabilisation.
amd64 arm arm64 hppa ppc ppc64 sparc x86 (ALLARCHES) done all arches done