Maintenance: Bump rubocop from 1.25.0 to 1.25.1
Bumps [rubocop](https://github.com/rubocop/rubocop) from 1.25.0 to 1.25.1.
- [Release notes](https://github.com/rubocop/rubocop/releases)
- [Changelog](https://github.com/rubocop/rubocop/blob/master/CHANGELOG.md)
- [Commits](https://github.com/rubocop/rubocop/compare/v1.25.0...v1.25.1)