Update tox from 3.15.0 to 3.15.1 (#348)

pyup-bot · abhinavsingh · web-flow · commit 84eedc46ec4f · 2020-05-24T09:25:02.000+05:30
Co-authored-by: Abhinav Singh &lt;mailsforabhinav@gmail.com&gt;
diff --git a/requirements-testing.txt b/requirements-testing.txt
@@ -7,6 +7,6 @@ autopep8==1.5.2
 mypy==0.770
 py-spy==0.3.3
 codecov==2.1.3
-tox==3.15.0
+tox==3.15.1
 mccabe==0.6.1
 pylint==2.5.2
