Bump arbre from 1.4.0 to 1.5.0
Bump arbre from 1.4.0 to 1.5.0

Bumps [arbre](https://github.com/activeadmin/arbre) from 1.4.0 to 1.5.0.
- [Release notes](https://github.com/activeadmin/arbre/releases)
- [Changelog](https://github.com/activeadmin/arbre/blob/master/CHANGELOG.md)
- [Commits](https://github.com/activeadmin/arbre/compare/v1.4.0...v1.5.0)

---
updated-dependencies:
- dependency-name: arbre
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@github.com>
deivid-rodriguez/activeadmin,deivid-rodriguez/activeadmin,deivid-rodriguez/activeadmin,activeadmin/activeadmin,activeadmin/activeadmin,activeadmin/activeadmin