Bump rubocop from 1.29.1 to 1.30.0

Bumps [rubocop](https://github.com/rubocop/rubocop) from 1.29.1 to 1.30.0.
- [Release notes](https://github.com/rubocop/rubocop/releases)
- [Changelog](https://github.com/rubocop/rubocop/blob/master/CHANGELOG.md)
- [Commits](rubocop/rubocop@v1.29.1...v1.30.0)

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

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

Author: dependabot[bot]

Gemfile.lock

@@ -18,16 +18,16 @@ GEM
     rake (13.0.6)
     regexp_parser (2.4.0)
     rexml (3.2.5)
-    rubocop (1.29.1)
+    rubocop (1.30.0)
       parallel (~> 1.10)
       parser (>= 3.1.0.0)
       rainbow (>= 2.2.2, < 4.0)
       regexp_parser (>= 1.8, < 3.0)
       rexml (>= 3.2.5, < 4.0)
-      rubocop-ast (>= 1.17.0, < 2.0)
+      rubocop-ast (>= 1.18.0, < 2.0)
       ruby-progressbar (~> 1.7)
       unicode-display_width (>= 1.4.0, < 3.0)
-    rubocop-ast (1.17.0)
+    rubocop-ast (1.18.0)
       parser (>= 3.1.1.0)
     ruby-progressbar (1.11.0)
     simplecov (0.21.2)