Update flake8 to 3.7.6 #577

sliverc merged 2 commits intomaster django-json-api/django-rest-framework-json-api:masterfrom

pyup-update-flake8-3.7.5-to-3.7.6 django-json-api/django-rest-framework-json-api:pyup-update-flake8-3.7.5-to-3.7.6Copy head branch name to clipboard