Update rubocop-ogat requirement from ~> 1.12.0 to ~> 1.13.0 (#32)
Update rubocop-ogat requirement from ~> 1.12.0 to ~> 1.13.0 (#32)

Updates the requirements on [rubocop-ogat](https://github.com/Outwood/rubocop-ogat) to permit the latest version.
- [Release notes](https://github.com/Outwood/rubocop-ogat/releases)
- [Commits](https://github.com/Outwood/rubocop-ogat/commits/v1.13.0)

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
Outwood/ogatstyle,Outwood/ogatstyle