Change support ruby versions

[Umekawa]

What

• close Migrate CI/CD platform from Travis CI to GitHub Actions. #7 Support Ruby v3.x #8
• Change support ruby versions
• migrate test from Travis CI to GitHub Actions
• Setup dependabot and code owner

Why

• Although this repository includes tests for Ruby 2.5–2.7, these versions are already EOL.
• Travis CI pricing changes
  • https://www.travis-ci.com/blog/2020-11-02-travis-ci-new-billing/

[gemini-code-assist]

Summary of Changes

Hello @Umekawa, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request modernizes the project's infrastructure by updating its supported Ruby versions, transitioning its continuous integration system from Travis CI to GitHub Actions, and implementing Dependabot for automated dependency management. These changes aim to improve maintainability, reduce reliance on deprecated services, and ensure the project remains current and secure.

Highlights

• Ruby Version Support: Adjusted the supported Ruby versions by removing End-of-Life (EOL) versions 2.5, 2.6, and 2.7, aligning the project with current Ruby releases.
• CI/CD Migration: Migrated the continuous integration pipeline from Travis CI to GitHub Actions, deprecating the use of Travis CI due to its recent pricing changes.
• Automated Dependency Updates: Configured Dependabot to automatically manage and update project dependencies for both Bundler and GitHub Actions, ensuring the project stays up-to-date with security patches and new features.

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Ignored Files

• Ignored by pattern: .github/workflows/** (2)
  • .github/workflows/CODEOWNERS
  • .github/workflows/test.yml

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[gemini-code-assist]

Code Review

This pull request successfully migrates the CI from Travis CI to GitHub Actions, updates the supported Ruby versions for testing, and sets up Dependabot for automated dependency updates. The changes are well-aligned with the goal of modernizing the repository's tooling. I have identified a configuration error in the new Dependabot setup that would prevent it from working as intended for GitHub Actions. Additionally, I've suggested a small improvement to the README to make the build status badge more user-friendly.

[Copilot]

Pull request overview

This PR migrates the CI/CD infrastructure from Travis CI to GitHub Actions and updates Ruby version support from EOL versions (2.5-2.7) to modern Ruby 3.x versions. It also introduces automation tooling via dependabot and code ownership configuration.

• Replaces Travis CI with GitHub Actions for running tests and linting
• Updates Ruby version support to 3.4 and 4.0
• Adds dependabot configuration for automated dependency updates
• Introduces CODEOWNERS for code review management

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
README.md	Updates CI badge from Travis CI to GitHub Actions
.travis.yml	Removes deprecated Travis CI configuration
.github/workflows/test.yml	Adds GitHub Actions workflow for running rspec and rubocop
.github/workflows/CODEOWNERS	Adds code ownership configuration (incorrect location)
.github/dependabot.yml	Configures automated dependency updates for bundler and GitHub Actions

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