Enabled Ruby 3.0 + RSpec

Enabled Ruby 3.0 + RSpec

Added in this fork

1. Enabled Ruby 3.0 + RSpec

2. Added random tests [1]

Done in this fork

Ruby 3.0 enabled in this fork

Enabled Ruby 3.0 + RSpec

1. Enabled Ruby 3.0 + RSpec

2. Added sample tests

3. Added random tests [1]

4. Changed the wording in description (set --> list) [2]

Enabled Ruby 3.0 + RSpec

Fixed in this fork

Approved

Done for Ruby, in this fork

1. Enabled Ruby 3.0 + RSpec [1]

2. Added more example tests for the solvers to deduce the pattern, following other languages [2]

1. Enabled Ruby 3.0 + RSpec

2. Description made language agnostic

Sorry for closing that issue prematurely, I should've noticed that the tolerance is too small... 🤦‍♂️

Please review & scrutinize Java fork