add pycodestyle to testing requirements file

bear · bear · commit a746465c71fd · 2016-08-02T19:07:43.000-04:00
diff --git a/requirements.testing.txt b/requirements.testing.txt
@@ -15,4 +15,5 @@ coveralls
 codecov
 check-manifest
 tox
-tox-pyenv
+tox-pyenv
+pycodestyle
