v4.6.7

commit 8afb87ddd5ed76a1446fb29e46043dda1aab43dc
Author: Greg Althaus <galthaus@austin.rr.com>
Date:   Sun Jul 18 15:19:47 2021 -0500

    build: fix python-version to 3.6

A   .python-version
M   .travis.yml

End of Note