```ruby
class CloudfoundryCli < Cask
  version '6.2.0'
  sha256 'c804b4245a194a1028b5ac2fe074755d18a8aa2eb37bfc9978a5a4e47e9e644d'

  url "http://go-cli.s3-website-us-east-1.amazonaws.com/releases/v#{version}/installer-osx-amd64.pkg"
  homepage 'https://github.com/cloudfoundry/cli'
  license :oss

  pkg 'installer-osx-amd64.pkg'
  uninstall :pkgutil => 'com.pivotal.cloudfoundry.pkg'
  caveats do
    files_in_usr_local
  end
end
```

Upgrade Cloud Foundry CLI to 6.6.1
user
```ruby
class CloudfoundryCli < Cask
  version '6.6.1'
  sha256 '1a159944a447b4b321513cadd8c009477dc084ce22b6bfd2e5e20382d98bb5e5'

  url "http://go-cli.s3-website-us-east-1.amazonaws.com/releases/v#{version}/installer-osx-amd64.pkg"
  homepage 'https://github.com/cloudfoundry/cli'
  license :oss

  pkg 'installer-osx-amd64.pkg'
  uninstall :pkgutil => 'com.pivotal.cloudfoundry.pkg'
  caveats do
    files_in_usr_local
  end
end
```
assistant