Bump parallel_tests from 1.7.0 to 2.14.1
Bump parallel_tests from 1.7.0 to 2.14.1

Bumps [parallel_tests](https://github.com/grosser/parallel_tests) from 1.7.0 to 2.14.1.
- [Commits](https://github.com/grosser/parallel_tests/compare/v1.7.0...v2.14.1)
theodi/open-data-certificate,theodi/open-data-certificate,theodi/open-data-certificate,theodi/open-data-certificate