Tests fail with python3.8

[mestia]

Here are the build logs for the Debian package: https://buildd.debian.org/status/package.php?p=pyscanfcs

Regards,
Alex

[paulmueller]

Looks like this is a problem with scikit-image not officially suporting Python 3.8 (see scikit-image/scikit-image#4261).

[mestia]

I see, thank you for looking into that.