Build nightlies from develop instead of master

ulope · ulope · commit 24701b3085f9 · 2019-06-07T21:02:47.000+02:00
[backported from develop]
diff --git a/.circleci/config.yml b/.circleci/config.yml
@@ -1121,4 +1121,4 @@ workflows:
           filters:
             branches:
               only:
-                - master
+                - develop
