full Ruby 3 and OpenSSL 3 compatibility

[beanieboi]

collected all the piece from other forks and put them together. this brings Ruby 3.2 compatibility and a working test suite as well.
running bundle exec rake on my machine 130 runs, 5404 assertions, 0 failures, 0 errors, 5 skips

[ekmartin]

Thank you!

[tt]

@potatosalad, it seems this is one of your older repositories so mentioning you explicitly in case you don't have notifications turned on.

If you've seen this pull request already or don't have time, please ignore this comment. However, if you haven't, I hope you have a moment to either review or let us know if this is unlikely to be merged for whatever reason.

Thank you and happy New Year! 🥳

[beanieboi]

Update: It's also running on Ruby 3.3.0

$ ruby -v         
ruby 3.3.0 (2023-12-25 revision 5124f9ac75) [x86_64-darwin23]
$ bundle exec rake
130 runs, 5405 assertions, 0 failures, 0 errors, 5 skips

[potatosalad]

Thanks, @beanieboi !