Bump parallel from 1.12.0 to 1.12.1
Bump parallel from 1.12.0 to 1.12.1

Bumps [parallel](https://github.com/grosser/parallel) from 1.12.0 to 1.12.1.
- [Commits](https://github.com/grosser/parallel/compare/v1.12.0...v1.12.1)
alphagov/whitehall,alphagov/whitehall,alphagov/whitehall,alphagov/whitehall