Similar to the recent adoption of Black. isort is a Python utility to
sort imports alphabetically and automatically separate into sections. By
using isort, contributors can quickly and automatically conform to the
projects style without thinking. Just let the tool do it.
Uses the configuration recommended by the Black to avoid conflicts of
style.
Rewrite TestImageQt.test_deprecated to no rely on import order.
Python 3.5's distutils added support for parallel builds, which means
that we don't need to monkeypatch it anymore. But more importantly, this
monkeypatch made build fail (hang in fact) whenever `--parallel` was
passed to `python setup.py build`.
This commit fixes the problem by not applying the monkeypatch on
python 3.5+ and preserve the old behavior (parallel build by default) by
injecting a `parallel` option when it's not specified.
