Update tox from 3.7.0 to 3.13.2 (#62)

pyup-bot · avara1986 · commit 59a89b4dff14 · 2019-07-03T18:26:03.000+02:00
diff --git a/requirements-tests.txt b/requirements-tests.txt
@@ -3,4 +3,4 @@ coveralls==1.8.1
 coverage==4.5.3
 nose==1.3.7
 pylint==2.3.1
-tox==3.7.0
+tox==3.13.2
