Merge pull request #8 from zeulb/tox-2.3.1-compatible

Update tox configuration

Author: ahothan

tox.ini

@@ -9,8 +9,7 @@ deps = -r{toxinidir}/requirements.txt
        -r{toxinidir}/test-requirements.txt
 commands=
   py.test -q -s \
-    --basetemp={envtmpdir}  \ # py.test tempdir setting
-    {posargs} # substitute with tox' positional arguments
+    --basetemp={envtmpdir}  {posargs}
 
 [flake8]
 show-source = True