Bump parallel_tests from 3.6.0 to 3.7.0 (#16024)

Bump parallel_tests from 3.6.0 to 3.7.0 (#16024)

Bumps [parallel_tests](https://github.com/grosser/parallel_tests) from 3.6.0 to 3.7.0.
- [Release notes](https://github.com/grosser/parallel_tests/releases)
- [Changelog](https://github.com/grosser/parallel_tests/blob/master/CHANGELOG.md)
- [Commits](https://github.com/grosser/parallel_tests/compare/v3.6.0...v3.7.0)

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