Update pytest from 3.7.3 to 3.8.1

pyup-bot · pyup-bot · commit 440ab443e67d · 2018-10-02T16:18:52.000+02:00
diff --git a/requirements_test.txt b/requirements_test.txt
@@ -1,4 +1,4 @@
-pytest==3.7.3
+pytest==3.8.1
 pytest-cov==2.6.0
 mock==2.0.0
 flake8==3.5.0
