Bump scenic to 1.4.0
Bump scenic to 1.4.0

Bumps [scenic](https://github.com/thoughtbot/scenic) from 1.3.0 to 1.4.0.
- [Changelog](https://github.com/thoughtbot/scenic/blob/master/NEWS.md)
- [Commits](https://github.com/thoughtbot/scenic/compare/v1.3.0...v1.4.0)

I'll automatically resolve any conflicts with this PR as long as you don't alter it yourself.

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ministryofjustice/prison-visits-2,ministryofjustice/prison-visits-2,ministryofjustice/prison-visits-2,ministryofjustice/prison-visits-2