chore(deps): Support compliance_engine 0.2.x

[silug]

Also test with Ruby 4.0

[Copilot]

Pull request overview

This PR broadens the supported compliance_engine versions, updates dependencies, bumps the gem version, and extends CI to test against Ruby 4.0.

Changes:

• Loosen compliance_engine runtime dependency to support 0.1.x–0.2.x and add an explicit json-schema dependency in the gemspec.
• Bump the library version to 0.4.1 and document the release in CHANGELOG.md.
• Update the GitHub Actions workflow to run style and spec tests on Ruby 4.0 and clarify the 3.2 job comment.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated no comments.

File	Description
scelint.gemspec	Expands compliance_engine version range to < 0.3.0 and adds json-schema ~> 5.0 as a runtime dependency, enabling compatibility with newer compliance engine releases.
lib/scelint/version.rb	Increments the gem’s version constant to 0.4.1 to reflect the new release.
CHANGELOG.md	Adds a new 0.4.1 entry describing compliance_engine 0.2.x support and Ruby 4.0 testing.
.github/workflows/pr_tests.yml	Extends CI to Ruby 4.0 (style and spec jobs) and updates the Ruby 3.2 matrix entry comment.

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