Update twine to 1.15.0#703

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

pyup-update-twine-1.14.0-to-1.15.0django-json-api/django-rest-framework-json-api:pyup-update-twine-1.14.0-to-1.15.0Copy head branch name to clipboard