Bump rubocop-rspec from 1.17.1 to 1.18.0
Bump rubocop-rspec from 1.17.1 to 1.18.0

Bumps [rubocop-rspec](https://github.com/backus/rubocop-rspec) from 1.17.1 to 1.18.0.
- [Release notes](https://github.com/backus/rubocop-rspec/releases/tag/v1.18.0)
- [Changelog](https://github.com/backus/rubocop-rspec/blob/master/CHANGELOG.md)
- [Commits](https://github.com/backus/rubocop-rspec/compare/v1.17.1...v1.18.0)
ministryofjustice/prison-visits-2,ministryofjustice/prison-visits-2,ministryofjustice/prison-visits-2,ministryofjustice/prison-visits-2