-r ./requirements.txt
-r ./requirements_rtfd.txt

coveralls
cryptography
flake8
pre-commit
pydocstyle
pyexcel
pyexcel-xlsx
pytest-cov
pytest-flake8
pytest-runner
watchdog
wheel
yapf

-r ./requirements.txt
-r ./requirements_rtfd.txt

coveralls
cryptography
flake8
pre-commit
pydocstyle
pyexcel
pyexcel-xlsx
pytest>=3.5
pytest-cov
pytest-flake8
pytest-runner
watchdog
wheel
yapf

Add version requirement on pytest.
Add version requirement on pytest.
