Re-integrate pytest-timeout plugin

Author: Peque

setup.py

@@ -66,6 +66,7 @@
             'pytest',
             'pytest-cov',
             'pytest-rerunfailures',
+            'pytest-timeout',
             'pytest-xdist',
         ],
     },

tox.ini

@@ -8,6 +8,9 @@ envlist =
     lint
     docs
 
+[pytest]
+timeout = 10
+
 [flake8]
 per-file-ignores =
     docs/source/conf.py: E121,E122,E265,E501