message: Invalided cache for slack badge
diff: [![Build Status](https://circleci.com/gh/zeit/now-cli.svg?style=shield)](https://circleci.com/gh/zeit/now-cli)
  [![XO code style](https://img.shields.io/badge/code_style-XO-5ed9c7.svg)](https://github.com/sindresorhus/xo)
  -[![Slack Channel](https://zeit-slackin.now.sh/badge.svg)](https://zeit.chat)
  +[![Slack Channel](http://zeit-slackin.now.sh/badge.svg)](https://zeit.chat)
  This is the command line interface for [now](https://zeit.co/now): Realtime global deployments served over HTTP/2.
  