Check the Semantic Versioning page for info on how to version the new release: http://semver.org

Ensure your local repo is up-to-date

git checkout main && git pull

Add an entry for the new release to CHANGELOG.md, and/or move the contents from the Unreleased to the new release

Increment the version in src/version.php

Stage the CHANGELOG.md and src/version.php files

git add CHANGELOG.md src/version.php

To update the version, commit and push the changes and create the appropriate tag - Packagist will pick it up and release it