Update stale.yml

.github/stale.yml

@@ -3,9 +3,10 @@ daysUntilClose: 7
 exemptLabels:
   - greenkeeper
   - bug
+  - feature
 staleLabel: wontfix
 markComment: >
   This issue has been automatically marked as stale because it has not had
   recent activity. It will be closed if no further activity occurs. Thank you
   for your contributions.
-closeComment: false
+closeComment: false