build: bump brianium/paratest from 7.2.7 to 7.3.1 (#306)

Bumps [brianium/paratest](https://github.com/paratestphp/paratest) from 7.2.7 to 7.3.1.
- [Release notes](https://github.com/paratestphp/paratest/releases)
- [Commits](paratestphp/paratest@v7.2.7...v7.3.1)

---
updated-dependencies:
- dependency-name: brianium/paratest
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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