-r requirements.txt

pytest >= 2.9.0
pytest-cov >= 2.2.1
pytest-flake8 >= 0.2
flake8 < 3.0.0
tox >= 2.3.1
setuptools-scm >= 1.11.1
Sphinx
sphinx-rtd-theme

-r requirements.txt

pytest >= 2.9.0
pytest-cov >= 2.2.1
pytest-flake8 >= 0.6
tox >= 2.3.1
setuptools-scm >= 1.11.1
Sphinx
sphinx-rtd-theme

Update pytest-flake8 and flake8 dependencies
Update pytest-flake8 and flake8 dependencies

pytest-flake8 0.6 now works with the most recent flake8 3.0.x.
