Bump capybara from 2.15.1 to 2.15.3
Bump capybara from 2.15.1 to 2.15.3

Bumps [capybara](https://github.com/teamcapybara/capybara) from 2.15.1 to 2.15.3.
- [Changelog](https://github.com/teamcapybara/capybara/blob/master/History.md)
- [Commits](https://github.com/teamcapybara/capybara/compare/2.15.1...2.15.3)
renocollective/member-portal,renocollective/member-portal,renocollective/member-portal