Bug#942237: fiat: autopkgtest needs update for new version of pytest

[Drew Parsons]

Package: python3-fiat
Version: 2019.1.0-2
Followup-For: Bug #942237

Upstream does have a patch, but it requires a new package pytest_cases.

There was some debate upstream about whether it would be better to
prepare the tests without needing to depend on the new package. I'm
waiting for that debate to resolve.

Drew