Add stale config

.github/stale.yml

@@ -0,0 +1,26 @@
+# Configuration for probot-stale - https://github.com/probot/stale
+
+# Number of days of inactivity before an Issue or Pull Request becomes stale
+daysUntilStale: 20
+
+# Number of days of inactivity before an Issue or Pull Request with the stale label is closed.
+# Set to false to disable. If disabled, issues still need to be closed manually, but will remain marked as stale.
+daysUntilClose: 7
+
+# Issues or Pull Requests with these labels will never be considered stale. Set to `[]` to disable
+exemptLabels:
+  - is:bug
+  - is:enhancement
+  - is:discussion
+
+# Label to use when marking as stale
+staleLabel: status:stale
+
+# Comment to post when marking as stale. Set to `false` to disable
+markComment: >
+  This issue has been automatically marked as stale because it has not had
+  activity in the last 20 days. It will be closed if no further activity
+  occurs within the next seven days. Thank you for your contributions.
+
+# Limit to only `issues` or `pulls`
+only: issues