Bump rubocop from 1.37.1 to 1.38.0 (#1096)

Bumps [rubocop](https://github.com/rubocop/rubocop) from 1.37.1 to 1.38.0.
- [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/v1.37.1...v1.38.0)

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

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Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Gemfile.lock

@@ -9,7 +9,7 @@ GEM
     rainbow (3.1.1)
     regexp_parser (2.6.0)
     rexml (3.2.5)
-    rubocop (1.37.1)
+    rubocop (1.38.0)
       json (~> 2.3)
       parallel (~> 1.10)
       parser (>= 3.1.2.1)