v1.4.1

This release improves the checks we use to maintain Build, with more test coverage and fixes to the CI workflow. The build behaviour in your projects stays the same.

• 122d8365 Update the CI workflow.
• 7f6e840e Restore the PHPUnit step in CI.
• 5b9205a5 Use Codecov v6.
• 4533b6b4 Increase test coverage.
• 687b6606 Update squizlabs/php_codesniffer from 3.13.5 to 4.0.1.