* Update implementation & spec to be 3.0 compatible

[PikachuEXE]

Mainly around the breaking behaviour change about keyword arguments

[PikachuEXE]

@egonSchiele
Please merge this and release 0.17 once you think it's ready

[egonSchiele]

nice change 👍

[egonSchiele]

0.17 published

[PikachuEXE]

Just realized 0.17 is released instead of 0.17.0
Oops

[mscwilson]

Hello, we had some trouble with keyword arguments for our gem (Snowplow Ruby tracker). Unfortunately, we've had to remove Contracts completely.

Because we need to support Ruby 2 and 3, it's not possible to select a Contracts version in the gemspec that will work for both. It's alright locally with a conditional statement in the gemspec, but that doesn't work with RubyGems.

Just wanted to let you know in case this affects others too.

[PikachuEXE]

Yup I wish I can support both.
But it's too difficult for me.

Feel free to try to make it compatible with both 2.7 & 3.x.
I think that's this gem is supporting (especially for Ruby 2 > 3 transition).