```ruby
class OmniDiskSweeper < Cask
  url 'http://www.omnigroup.com/download/latest/omnidisksweeper'
  homepage 'http://www.omnigroup.com/products/omnidisksweeper/'
  version '1.8'
  sha1 '8061c4d7ee18549f976119146f28e67180141069'
  link 'OmniDiskSweeper.app'
end
```

Update OmniDiskSweeper to use latest scheme
user
```ruby
class OmniDiskSweeper < Cask
  url 'http://www.omnigroup.com/download/latest/omnidisksweeper'
  homepage 'http://www.omnigroup.com/products/omnidisksweeper/'
  version 'latest'
  no_checksum
  link 'OmniDiskSweeper.app'
end
```
assistant