Bump capybara from 2.15.4 to 2.16.0
Bump capybara from 2.15.4 to 2.16.0

Bumps [capybara](https://github.com/teamcapybara/capybara) from 2.15.4 to 2.16.0.
- [Changelog](https://github.com/teamcapybara/capybara/blob/master/History.md)
- [Commits](https://github.com/teamcapybara/capybara/compare/2.15.4...2.16.0)
ministryofjustice/prison-visits-public,ministryofjustice/prison-visits-public,ministryofjustice/prison-visits-public,ministryofjustice/prison-visits-public