Update tox from 3.1.1 to 3.1.2

pyup-bot · pyup-bot · commit 7237874d6794 · 2018-07-13T05:35:16.000+08:00
diff --git a/requirements_dev.txt b/requirements_dev.txt
@@ -14,7 +14,7 @@ quart==0.6.3;python_version>="3.6"
 # tests
 coverage==4.5.1
 flake8==3.5.0
-tox==3.1.1
+tox==3.1.2
 pytest==3.6.3
 pytest-runner==4.2
 pytest-asyncio==0.8.0
