👷 ignore gh-pages branch in CircleCI

.circleci/config.yml

@@ -45,10 +45,12 @@ workflows:
   build_and_test_all:
     jobs:
       - build_stable:
-          branches:
+          filters:
-            ignore:
+            branches:
-              gh-pages
+              ignore:
+                gh-pages
       - build_bleeding_edge:
-          branches:
+          filters:
-            ignore:
+            branches:
-              gh-pages
+              ignore:
+                gh-pages