Use a stable build of django-evolution for Djblets dev environments.
Review Request #8394 — Created Sept. 12, 2016 and submitted
We were installing the master branch of django-evolution for development environments, for the sake of unit tests. This could end up conflicting with the consuming application's version. We now depend on the current version or newer. Since django-evolution has historically been backwards-compatible, this range will suffice for now.
pip install -r dev-requirements.txtin a new virtualenv, and
verified that it fetched the latest stable django_evolution.