Require pytest>=3.6 because we are using the new marker API

nicoddemus · nicoddemus · commit 577a684a9f34 · 2018-09-06T12:22:17.000-03:00
diff --git a/requirements/main.txt b/requirements/main.txt
@@ -1,2 +1,3 @@
+pytest>=3.6
 Flask
-Werkzeug>=0.7
+Werkzeug>=0.7
