Update behat/behat requirement in /build/integration

Updates the requirements on [behat/behat](https://github.com/Behat/Behat) to permit the latest version.
- [Release notes](https://github.com/Behat/Behat/releases)
- [Changelog](https://github.com/Behat/Behat/blob/master/CHANGELOG.md)
- [Commits](https://github.com/Behat/Behat/compare/v3.8.0...v3.9.0

)

---
updated-dependencies:
- dependency-name: behat/behat
  dependency-type: direct:development
...

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