Ruby 3.3.1 warning

[formigarafa]

Hello, head-up. https://github.com/zvory/csv-safe/blob/master/lib/csv-safe.rb#L3 requires csv gem.

And now, on ruby 3.3.1 this warning is being raised.

warning: /usr/local/lib/ruby/3.3.0/csv.rb was loaded from the standard library, but will no longer be part of the default gems since Ruby 3.4.0. Add csv to your Gemfile or gemspec. Also contact author of csv-safe-3.0.0 to add csv into its gemspec.

cheers. :)