added probot to help with stale issues

.github/stale.yml

@@ -0,0 +1,18 @@
+# Configuration for probot-stale - https://github.com/probot/stale
+
+# Number of days of inactivity before an Issue or Pull Request becomes stale
+daysUntilStale: 31
+# Number of days of inactivity before a stale Issue or Pull Request is closed
+daysUntilClose: 14 
+# Only issues or pull requests with all of these labels are check if stale. Defaults to `[]` (disabled)
+onlyLabels:
+  - waiting for info
+  - wontfix
+
+# Label to use when marking as stale
+staleLabel: inactive
+
+# Comment to post when marking as stale. Set to `false` to disable
+markComment: >
+  This issue has been automatically marked as inactive because it has not had
+  recent activity. It will be closed if no further activity occurs.