Merge pull request #12 from joealba/2025-ruby-version-updates

ci: Test against more recent versions of Ruby, including one ancient v2.7

v0.5.1 - Ruby 3.2 compat

File.exists? -> File.exist? -- the former is deprecated

test: Update Ruby language version matrix for testing

readme: Fix global switch syntax

readme: Removed more old notes

readme: Remove Travis CI badge and old irrelevant notes

Merge pull request #10 from joealba/dry-cli

Travis CI -> GitHub Actions

Transition from thor to dry-cli

Travis: Test with the latest 3 supported Ruby versions

Add code coverage and provide coverage reports to codeclimate

[travisci] Use the latest Ruby versions for 2.2, 2.3, and 2.4

Update the list of Ruby versions to test in Travis CI