Update gc_ruboconfig requirement from ~> 2.26.0 to ~> 2.29.0
Update gc_ruboconfig requirement from ~> 2.26.0 to ~> 2.29.0

Updates the requirements on [gc_ruboconfig](https://github.com/gocardless/ruboconfig) to permit the latest version.
- [Release notes](https://github.com/gocardless/ruboconfig/releases)
- [Changelog](https://github.com/gocardless/gc_ruboconfig/blob/master/CHANGELOG.md)
- [Commits](https://github.com/gocardless/ruboconfig/compare/v2.26.0...v2.29.0)

---
updated-dependencies:
- dependency-name: gc_ruboconfig
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@github.com>
gocardless/business