Use bot to close stale issues/PRs

[DiegoRBaquero]

Would like to get the community feedback about using https://probot.github.io/apps/stale/

Please vote with a reaction and comment below if you have any thoughts :)

@webtorrent (Does this mention all org?)

[feross]

I like the idea. Let's test it out on a single repo to see how it works. I sent a PR to webtorrent/webtorrent to try this out. If it works well, we can bring it to webtorrent/webtorrent-desktop and perhaps others. Though, these bots do seem primarily useful on high-traffic issue trackers to help with the load.

@DiegoRBaquero, I also created a team with everyone in the org @webtorrent/folks for future use :)

[feross]

PR here: #1369