-r requirements.txt
pytest==5.4.3
tox==3.15.2
flake8==3.8.3
isort==4.3.21
docutils==0.16
check-manifest==0.42
readme-renderer==26.0
pygments==2.6.1
sphinx==3.1.1
sphinx_rtd_theme==0.5.0
coverage==5.1
twine==3.1.1
wheel==0.34.2
advbumpversion==1.2.0

-r requirements.txt
pytest==5.4.3
tox==3.17.1
flake8==3.8.3
isort==4.3.21
docutils==0.16
check-manifest==0.42
readme-renderer==26.0
pygments==2.6.1
sphinx==3.1.1
sphinx_rtd_theme==0.5.0
coverage==5.1
twine==3.1.1
wheel==0.34.2
advbumpversion==1.2.0

Update tox from 3.15.2 to 3.17.1
Update tox from 3.15.2 to 3.17.1