message: update Firebase CLI requirements
diff: @@ -25,7 +25,7 @@ Make sure you have the following installed:
  - [Git](https://git-scm.com/downloads)
  - [Node](https://nodejs.org/en/download/) 10, 11, or 12
  - [Yarn](https://classic.yarnpkg.com/en/docs/install/)
  -- [Firebase CLI](https://firebase.google.com/docs/cli)
  +- [Firebase CLI](https://firebase.google.com/docs/cli) 8
  Also, make sure you are logged in to your Firebase account in the Firebase CLI:
  