Update pytest from 3.0.0 to 3.0.1

Author: pyup-bot

requirements_dev.txt

@@ -4,7 +4,7 @@ bumpversion==0.5.3
 coverage==4.2
 flake8==3.0.4
 pytest-cov==2.3.1
-pytest==3.0.0
+pytest==3.0.1
 requests==2.11.1
 responses==0.5.1
 sphinx-rtd-theme==0.1.9