Add Truffleruby head to CI

[gogainda]

No description provided.

[gogainda]

@byroot pls review/merge

[byroot]

What's the goal here? Marginalia is a very simple gem, why does it need to be tested against truffle-head?

[gogainda]

once tests are passing against truffleruby(like here) we are adding it to the list of supported gems here https://github.com/eregon/truffleruby-gem-tracker It will help us to track any regressions which may occur during development

[byroot]

The thing is I can't think of anything in Marginalia that would break on Truffle, that wouldn't already break in dozens if not hundreds of other gems.

If it was a stable release then maybe, but running -head without marking it as allowing failure is a support burden.

Also this makes CI 7 times slower. I really don't see the usefulness really.

[sj26]

Thanks, but CI has been moved to GitHub Actions in #124.