[Security] Bump hoek from 4.1.1 to 4.2.1
[Security] Bump hoek from 4.1.1 to 4.2.1

Bumps [hoek](https://github.com/hapijs/hoek) from 4.1.1 to 4.2.1. **This update includes security fixes.**
- [Release notes](https://github.com/hapijs/hoek/releases)
- [Changelog](https://github.com/hapijs/hoek/blob/master/CHANGELOG.md)
- [Commits](https://github.com/hapijs/hoek/compare/v4.1.1...v4.2.1)

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
mediamonks/seng-event,mediamonks/seng-event