Bump parallel_tests from 3.2.0 to 3.3.0 (#1070)
Bump parallel_tests from 3.2.0 to 3.3.0 (#1070)

Bumps [parallel_tests](https://github.com/grosser/parallel_tests) from 3.2.0 to 3.3.0.
- [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/v3.2.0...v3.3.0)

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@github.com>

Co-authored-by: dependabot[bot] <1c358da00a777d4e9898c1280ab801e2df165188@users.noreply.github.com>
brightbytes/heroku-buildpack-ruby-without-assets-precompile,heroku/heroku-buildpack-ruby,Scalingo/ruby-buildpack,Genius/heroku-buildpack-ruby,instacart/heroku-buildpack-ruby,instacart/heroku-buildpack-ruby,Scalingo/ruby-buildpack,heroku/heroku-buildpack-ruby,brightbytes/heroku-buildpack-ruby-without-assets-precompile,Genius/heroku-buildpack-ruby