Merge 35d76d1 into 3b2c700

Author: pyup-bot

requirements_dev.txt

@@ -29,9 +29,9 @@ PyYAML==5.1
 requests==2.21.0
 six==1.12.0
 snowballstemmer==1.2.1
-Sphinx==1.8.5
+Sphinx==2.0.0
 sphinxcontrib-websupport==1.1.0
-tox==3.7.0
+tox==3.8.1
 urllib3==1.24.1
 virtualenv==16.4.3
 watchdog==0.9.0