Bump parser from 2.7.0.2 to 2.7.0.3
Bump parser from 2.7.0.2 to 2.7.0.3

Bumps [parser](https://github.com/whitequark/parser) from 2.7.0.2 to 2.7.0.3.
- [Release notes](https://github.com/whitequark/parser/releases)
- [Changelog](https://github.com/whitequark/parser/blob/master/CHANGELOG.md)
- [Commits](https://github.com/whitequark/parser/compare/v2.7.0.2...v2.7.0.3)

Signed-off-by: dependabot-preview[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
alphagov/whitehall,alphagov/whitehall,alphagov/whitehall,alphagov/whitehall