wrong number of arguments (given 5, expected 4) about propono

[BiggerNoise]

Hello

This one is giving us grief, so I'm working on a P/R for you.

I am running into one issue: Ruby 2.7 seems to be happy with the double splat changes in 3.0, but 2.6 seems to be choking on them. (https://github.com/KoanHealth/propono/actions)

Unfortunately, I have an M1 mac and rbenv won't install anything earlier than 2.7, so I'm having trouble looking more closely at this.

If 2.6 support is key for y'all, then I'll see if I can rope a coworker into helping me out. O/w I can drop 2.6 from the matrix.

Please let me know which you would prefer.

[iHiD]

Yeah - so I think Ruby 3 needs **kwargs wherever it uses *args. I don't have time to look at this until Exercism has launched (http://countdown.exercism.io/) but will after that. I'll happily accept a PR too. You can turn on Ruby 3 in CI here: https://github.com/iHiD/propono/blob/main/.github/workflows/tests.yml#L18

[iHiD]

@BiggerNoise Thanks!
@dougal Tagging you here too as I'm not using Propono in production anywhere atm.