Update flake8 to 3.7.3#113

pyup-bot wants to merge 1 commit intomastermwisner/python-kong-management:masterfrom

pyup-update-flake8-3.5.0-to-3.7.3mwisner/python-kong-management:pyup-update-flake8-3.5.0-to-3.7.3Copy head branch name to clipboard