Add cask for MacGDBp app
user
```ruby
class Macgdbp < Cask
  url 'https://www.bluestatic.org/downloads/macgdbp/macgdbp-1.5.zip'
  homepage 'https://www.bluestatic.org/software/macgdbp/'
  version '1.5'
  sha256 '90697835c77c0a294cea7aec62276fbf6920763968e5c77a0791199c7d718744'
  link 'MacGDBp.app'
end
```
assistant