CONTRIBUTING.md in absolutely-5.0.0 vs CONTRIBUTING.md in absolutely-5.1.0

@@ -6,11 +6,11 @@
 1. Review open [pull requests][pulls].
 1. Report a new [issue][issues]. _Only do this after you've made sure the behavior or problem you're observing isn't already documented in an open issue._
 
 ## Getting Started
 
-Absolutely is developed using Ruby 2.5.8 and is additionally tested against Ruby 2.6 and 2.7 using [Travis CI](https://travis-ci.com/jgarber623/absolutely).
+Absolutely is developed using Ruby 2.5.8 and is additionally tested against Ruby 2.6, 2.7, and 3.0 using [CircleCI](https://app.circleci.com/pipelines/github/jgarber623/absolutely).
 
 Before making changes to Absolutely, you'll want to install Ruby 2.5.8. It's recommended that you use a Ruby version managment tool like [rbenv](https://github.com/rbenv/rbenv), [chruby](https://github.com/postmodern/chruby), or [rvm](https://github.com/rvm/rvm). Once you've installed Ruby 2.5.8 using your method of choice, install the project's gems by running:
 
 ```sh
 bundle install
@@ -20,10 +20,10 @@
 
 1. Fork and clone the project's repo.
 1. Install development dependencies as outlined above.
 1. Create a feature branch for the code changes you're looking to make: `git checkout -b my-new-feature`.
 1. _Write some code!_
-1. If your changes would benefit from testing, add the necessary tests and verify everything passes by running `bundle exec rspec`.
+1. If your changes would benefit from testing, add the necessary tests and verify everything passes by running `bin/ci`.
 1. Commit your changes: `git commit -am 'Add some new feature or fix some issue'`. _(See [this excellent article](https://chris.beams.io/posts/git-commit/) for tips on writing useful Git commit messages.)_
 1. Push the branch to your fork: `git push -u origin my-new-feature`.
 1. Create a new [pull request][pulls] and we'll review your changes.
 
 ## Code Style