Fix breakages due to Mypy chages#221

Merged

offbyone merged 2 commits intohamcrest:mainfrom brunns:220-fix-broken-build

Nov 14, 2022

+5-6

Commits on Nov 14, 2022

Mypy 0.990 has been released, and it appears that some of the error messages have changed somewhat, which breaks our build. I've changed some tests to reflect the changes.
brunns
committed
Drop 3.6 testing.
brunns
committed