Update CI to latest Ruby patch versions

[nethad]

I'm updating the rufo CI config to support the latest Ruby patch versions.

[codecov[bot]]

Codecov Report

Merging #276 (2af4e4e) into master (fa52a55) will not change coverage. The diff coverage is n/a.

:exclamation: Current head 2af4e4e differs from pull request most recent head ee27a7e. Consider uploading reports for the commit ee27a7e to get more accurate results

@@           Coverage Diff           @@
##           master     #276   +/-   ##
=======================================
  Coverage   96.92%   96.92%           
=======================================
  Files          19       19           
  Lines        2794     2794           
=======================================
  Hits         2708     2708           
  Misses         86       86           

Help us with your feedback. Take ten seconds to tell us how you rate us. Have a feature suggestion? Share it here.

[gingermusketeer]

Hi, thanks for the PR. If you want to remove ruby 3.1 for now we can get the changes merged in and then 3.1 can be a separate PR.

[kzkn]

We have moved our CI to GitHub Actions (#283). So I close this Pull Request. Thanks for the contribution!