Bug#913521: python-xarray: Needs python3.6 for build tests but doesn't Build-Depend on it

[Jeremy Bicha]

Source: python-xarray
Version: 0.10.9-1
Severity: serious
X-Debbugs-CC: mckinstry at debian.org

python-xarray hard-codes python3.6 in its build tests (which are run
by default in recent debhelper versions and test failures will fail
the build). It Build-Depends on python3-all but not python3.6.

In Ubuntu 19.04 Alpha, python3-all currently depends on python3.7
only. I am filing this bug as serious now since that change will also
be made in Debian Unstable soon.

Thanks,
Jeremy Bicha