Update sphinx to 2.0.0#605

sliverc merged 1 commit intomasterdjango-json-api/django-rest-framework-json-api:masterfrom

pyup-update-sphinx-1.8.5-to-2.0.0django-json-api/django-rest-framework-json-api:pyup-update-sphinx-1.8.5-to-2.0.0Copy head branch name to clipboard