Update pytest from 3.10.1 to 4.0.0 (#516)

pyup-bot · sliverc · commit 27cfac5b5848 · 2018-11-15T08:42:30.000+01:00
diff --git a/requirements-development.txt b/requirements-development.txt
@@ -8,7 +8,7 @@ flake8==3.6.0
 flake8-isort==2.5
 isort==4.3.4
 mock==2.0.0
-pytest==3.10.1
+pytest==4.0.0
 pytest-django==3.4.4
 pytest-factoryboy==2.0.2
 recommonmark==0.4.0
