Bump version of pytest for compatability with pytest-cov

mwbenowitz · mwbenowitz · commit dcd19650f60c · 2019-04-30T11:09:21.000-04:00
diff --git a/tests/dev_requirements.txt b/tests/dev_requirements.txt
@@ -1,5 +1,5 @@
 bumpversion==0.5.3
 pre-commit==0.15.0
-pytest
+pytest>=3.6
 pytest-cov
 flake8
