[pkg] Restrict yams version to be less than 0.45.0
Because of reader's API changes x and other subtle but hard to debug changes
in appobjects registration in version 0.45.0.
Closes #17065626.
[tox]
envlist = py27,py34,flake8
[testenv]
sitepackages = true
deps =
pytest
commands =
{envpython} -m pytest {posargs:test}
[testenv:flake8]
skip_install = true
whitelist_externals =
flake8
deps =
flake8
commands = flake8
[flake8]
exclude = cubicweb_%(cubename)s/migration/*,test/data/*,.tox/*