Commit 5eb9136

1. Make sure that you have [homebrew cask](https://caskroom.github.io/).

1. `brew update`

1. `cd /usr/local/Homebrew/Library/Taps/caskroom/homebrew-cask/Casks`

1. Edit `./powershell.rb`, reference [file history](https://github.com/vors/homebrew-cask/commits/master/Casks/powershell.rb) for the guidelines:

1. Update `version`

1. Update `sha256` to the checksum of produced `.pkg` (note lower-case string for the consistent style)

1. Update `checkpoint` value. To do that run `brew cask _appcast_checkpoint --calculate 'https://github.com/PowerShell/PowerShell/releases.atom'`

1. `brew cask style --fix ./powershell.rb`, make sure there are no errors

1. `brew cask audit --download ./powershell.rb`, make sure there are no errors

1. `brew cask upgrade powershell`, make sure that powershell was updates successfully

1. Commit your changes, send a PR to [homebrew-cask](https://github.com/caskroom/homebrew-cask)

1. Add [homebrew cask versions](https://github.com/Homebrew/homebrew-cask-versions): `brew tap homebrew/cask-versions`

1. `brew update`

1. `cd /usr/local/Homebrew/Library/Taps/homebrew/homebrew-cask-versions/Casks`

1. Edit `./powershell-preview.rb`:

1. Update `version`

1. Update `sha256` to the checksum of produced `.pkg` (note lower-case string for the consistent style)

1. Update `checkpoint` value. To do that run `brew cask _appcast_checkpoint --calculate 'https://github.com/PowerShell/PowerShell/releases.atom'`

1. `brew cask style --fix ./powershell-preview.rb`, make sure there are no errors

1. `brew cask audit --download ./powershell-preview.rb`, make sure there are no errors

1. `brew cask upgrade powershell-preview`, make sure that powershell was updates successfully

1. Commit your changes, send a PR to [homebrew-cask-versions](https://github.com/Homebrew/homebrew-cask-versions)