Porting python implementation to ruby

[ProGM]

Hi there,

This is a porting of the python implementation in Ruby. I need this library for our company projects in Ruby on Rails 💎

I hope you'll decide to merge this ;)

Implementation details:

• Supports ruby 2.7+
• It's ready to be released on rubygems.org
• Tests use made with rspec, implementing the same suite of Python (runnable via bundle exec rspec)
• Documentation using Yard (runnable via bundle exec yardoc)
• It's configured with rubocop for code linting