Bump rubocop from 1.14.0 to 1.15.0 (#770)
Bump rubocop from 1.14.0 to 1.15.0 (#770)

Bumps [rubocop](https://github.com/rubocop/rubocop) from 1.14.0 to 1.15.0.
- [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/v1.14.0...v1.15.0)

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

Co-authored-by: dependabot[bot] <1c358da00a777d4e9898c1280ab801e2df165188@users.noreply.github.com>
ONLYOFFICE/ooxml_parser