Make issues stale on much longer timescales (#1135)

Author: rieder

.github/stale.yml

@@ -1,7 +1,7 @@
 # Number of days of inactivity before an issue becomes stale
-daysUntilStale: 60
+daysUntilStale: 365
 # Number of days of inactivity before a stale issue is closed
-daysUntilClose: 28
+daysUntilClose: 365
 # Issues with these labels will never be considered stale
 exemptLabels:
   - pinned
@@ -14,7 +14,8 @@ staleLabel: 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 28 days if no further activity occurs.
+  recent activity. It will be closed in 365 days if no further activity occurs.
   Thank you for your contributions.
 # Comment to post when closing a stale issue. Set to `false` to disable
-closeComment: false
+closeComment: >
+  This issue has had no activity for over two years, closing.