Add Google Play Music Desktop Player.app v3.0.0
user
```ruby
cask 'google-play-music-desktop-player' do
  version '3.0.0'
  sha256 '7196a2a6e179ec085c33849e735a6f6725b009d0415cf7c19f4f2dfd199ec7a3'

  # github.com/MarshallOfSound/Google-Play-Music-Desktop-Player-UNOFFICIAL- was verified as official when first introduced to the cask
  url "https://github.com/MarshallOfSound/Google-Play-Music-Desktop-Player-UNOFFICIAL-/releases/download/#{version}/Google.Play.Music.Desktop.Player.OSX.zip"
  appcast 'https://github.com/MarshallOfSound/Google-Play-Music-Desktop-Player-UNOFFICIAL-/releases.atom',
          checkpoint: '4764609a96b400945bcaa7e0ae48da9428159f18314050f2ba9692aaa6e5afc6'
  name 'Google Play Music Desktop Player'
  homepage 'http://www.googleplaymusicdesktopplayer.com/'
  license :mit

  app 'Google Play Music Desktop Player.app'

  zap delete: [
                '~/Library/Application\ Support/Google\ Play\ Music\ Desktop\ Player',
                '~/Library/Application\ Support/com.apple.sharedfilelist/com.apple.LSSharedFileList.ApplicationRecentDocuments/google-play-music-desktop-player.sfl',
                '~/Library/Application\ Support/google-play-music-desktop-player.ShipIt',
                '~/Library/Caches/Google\ Play\ Music\ Desktop\ Player',
                '~/Library/Caches/google-play-music-desktop-player',
                '~/Library/Cookies/google-play-music-desktop-player.binarycookies',
                '~/Library/Preferences/google-play-music-desktop-player.plist',
                '~/Library/Saved\ Application\ State/google-play-music-desktop-player.savedState'
              ]
end
```
assistant