Bump capybara from 2.16.1 to 2.17.0
Bump capybara from 2.16.1 to 2.17.0

Bumps [capybara](https://github.com/teamcapybara/capybara) from 2.16.1 to 2.17.0.
- [Changelog](https://github.com/teamcapybara/capybara/blob/master/History.md)
- [Commits](https://github.com/teamcapybara/capybara/compare/2.16.1...2.17.0)
alphagov/collections-publisher,alphagov/collections-publisher,alphagov/collections-publisher