chore(dependencies): Bump excon from 0.59.0 to 0.60.0
chore(dependencies): Bump excon from 0.59.0 to 0.60.0

Bumps [excon](https://github.com/excon/excon) from 0.59.0 to 0.60.0.
- [Changelog](https://github.com/excon/excon/blob/master/changelog.txt)
- [Commits](https://github.com/excon/excon/compare/v0.59.0...v0.60.0)
ministryofjustice/prison-visits-public,ministryofjustice/prison-visits-public,ministryofjustice/prison-visits-public,ministryofjustice/prison-visits-public