Github deployment cleaner

This tool performs all calls client side, no keys will be saved. All calls are performed directly on the Github API. See source code here: https://github.com/jaap/github-deployment-cleaner

Based on https://stackblitz.com/edit/github-deployment-clearer And https://stackoverflow.com/questions/53452910/how-to-remove-a-github-environment

RECOMMENDED: Disconnect HEROKU from Github before doing this (though not strictly necessary, I think).
See https://stackoverflow.com/a/61272173/6569950 for more info.

Get deployments - Gets only 30 at a time. Repeat if needed. I'll accept a PR to do some smarter automation.
# Description Creator Created at Delete all
{{ deployment.id }} {{ deployment.description }} {{ deployment.creator.login }} {{ deployment.created_at }} Delete