Merge pull request #507 from cucumber/add-stale-bot

Add stale bot

.github/stale.yml

@@ -0,0 +1,17 @@
+# Number of days of inactivity before an issue becomes stale
+daysUntilStale: 60
+# Number of days of inactivity before a stale issue is closed
+daysUntilClose: 7
+# Issues with these labels will never be considered stale
+exemptLabels:
+  - type-of-issue/slow-burner
+# Label to use when marking an issue as stale
+staleLabel: status/stale
+# Comment to post when marking an issue as stale. Set to `false` to disable
+markComment: >
+  This issue has been automatically marked as stale because it has not had
+  recent activity. It will be closed in a week if no further activity occurs.
+# Comment to post when closing a stale issue. Set to `false` to disable
+closeComment: >
+  This issue has been automatically closed because of inactivity.
+  You can support the Cucumber core team on [opencollective](https://opencollective.com/cucumber).