Bump tox from 3.20.0 to 3.20.1 (#73)

dependabot[bot] · web-flow · commit 628f51e96e11 · 2020-10-29T14:20:56.000Z
diff --git a/requirements_dev.txt b/requirements_dev.txt
@@ -4,6 +4,6 @@ flake8==3.8.3
 pip==20.2.3
 pytest==6.1.0
 Sphinx==3.2.1
-tox==3.20.0
+tox==3.20.1
 twine==1.15.0
 wheel==0.35.1
