Update tox to 3.1.3#127

pyup-bot wants to merge 1 commit intodevelopTemelio/monitoring-lib-python:developfrom

pyup-update-tox-3.0.0-to-3.1.3Temelio/monitoring-lib-python:pyup-update-tox-3.0.0-to-3.1.3Copy head branch name to clipboard