build(deps): bump openmage/composer-plugin from 3.0.0 to 3.1.0

Bumps [openmage/composer-plugin](https://github.com/OpenMage/composer-plugin) from 3.0.0 to 3.1.0.
- [Release notes](https://github.com/OpenMage/composer-plugin/releases)
- [Commits](OpenMage/composer-plugin@v3.0.0...v3.1.0)

---
updated-dependencies:
- dependency-name: openmage/composer-plugin
  dependency-version: 3.1.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]