[pkg] Set an upper bound to passlib
We're using a deprecated API and are getting the following deprecation
warning:
::
the method passlib.context.CryptContext.encrypt() is deprecated as of
Passlib 1.7, and will be removed in Passlib 2.0, use CryptContext.hash()
instead.
So let's make sure we're getting a working library.
[ci skip]
version=3
opts=uversionmangle=s/(rc|a|b|c)/~$1/ \
https://pypi.debian.net/cubicweb/cubicweb-(.+)\.(?:zip|tgz|tbz|txz|(?:tar\.(?:gz|bz2|xz)))