Configure Probot's stale bot
Configure Probot's stale bot

It will close stale issues/PRs if no activity happens there.

Refs:
- https://gitter.im/cherrypy/cherrypy?at=59301d55331deef4646a0fff
- https://github.com/apps/stale
- https://github.com/probot/stale

cherrypy/cheroot