Update pytest-runner from 4.4 to 5.1

pyup-bot · pyup-bot · commit 2dff30c7dcea · 2019-05-24T19:41:20.000+02:00
diff --git a/setup_requirements.txt b/setup_requirements.txt
@@ -1 +1 @@
-pytest-runner==4.4
+pytest-runner==5.1
