Bump testng from 7.7.1 to 7.8.0

Bumps [testng](https://github.com/testng-team/testng) from 7.7.1 to 7.8.0.
- [Release notes](https://github.com/testng-team/testng/releases)
- [Changelog](https://github.com/testng-team/testng/blob/master/CHANGES.txt)
- [Commits](https://github.com/testng-team/testng/compare/7.7.1...7.8.0

)

---
updated-dependencies:
- dependency-name: org.testng:testng
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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