Bump rubocop from 0.93.1 to 1.3.0 (#15170)

Bumps [rubocop](https://github.com/rubocop-hq/rubocop) from 0.93.1 to 1.3.0.
- [Release notes](https://github.com/rubocop-hq/rubocop/releases)
- [Changelog](https://github.com/rubocop-hq/rubocop/blob/master/CHANGELOG.md)
- [Commits](https://github.com/rubocop-hq/rubocop/compare/v0.93.1...v1.3.0

)

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