message: docs(readme): update readme file
  * docs(readme): update readme file
  Update the main readme file
  * docs(readme): update readme file
diff: @@ -22,8 +22,10 @@ Reactive Extensions Library for JavaScript. This is a rewrite of [Reactive-Exten
  ## Versions In This Repository
  -- [master](https://github.com/ReactiveX/rxjs/commits/master) - This is all of the current, unreleased work, which is against v6 of RxJS right now
  -- [stable](https://github.com/ReactiveX/rxjs/commits/stable) - This is the branch for the latest version you'd get if you do `npm install rxjs`
  +- [master](https://github.com/ReactiveX/rxjs/commits/master) - This is all of the current, unreleased work, which is against v7 of RxJS right now
  +- [stable](https://github.com/ReactiveX/rxjs/tree/6.x) - This is the branch for the latest version you'd get if you do `npm install rxjs`
  +
  +Most PRs should be made to **master**.
  ## Important
  