Time to start planning for the 1.20.x branch. These are my thoughts at the
- Keep support for Python 3.6. Python 3.7 came out in June 2018, which
seems too recent to be our oldest supported version.
- Drop Python 3.6 for 1.21.x, that will make the oldest supported
version about three years old.
- Drop manylinux1 for 1.21.x. It would be nice to drop earlier, but
manylinux2010 is pretty recent.
There were 33 wheels in the 1.19.3 release, I think we can live with that
for 1.20.x. I'm more worried about our tools aging out. After Python has
settled into its yearly release cycle, I think we will end up supporting
the latest 4 versions.