[test] Use cubicweb-file < 2.0.0 From version 2.0.0, cubicweb-file moved to new-style layout (Python package) but we still expect it to be an old-style cube in CubicWeb's tests (WebconfigTC in web/test/unittest_webconfig.py).

version=3
opts=uversionmangle=s/(rc|a|b|c)/~$1/ \
https://pypi.debian.net/cubicweb/cubicweb-(.+)\.(?:zip|tgz|tbz|txz|(?:tar\.(?:gz|bz2|xz)))