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](https://github.com/rubocop/rubocop/compare/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>

Gemfile.lock

@@ -414,9 +414,9 @@ GEM
       delayed_job (>= 3.0, < 5)
     diff-lcs (1.5.0)
     digest (3.1.0)
-    disposable (0.6.2)
+    disposable (0.6.3)
       declarative (>= 0.0.9, < 1.0.0)
-      representable (>= 3.1.1, < 3.2.0)
+      representable (>= 3.1.1, < 4)
     domain_name (0.5.20190701)
       unf (>= 0.0.5, < 1.0.0)
     doorkeeper (5.5.4)
@@ -810,7 +810,7 @@ GEM
       json
     redcarpet (3.5.1)
     regexp_parser (2.4.0)
-    representable (3.1.1)
+    representable (3.2.0)
       declarative (< 0.1.0)
       trailblazer-option (>= 0.1.1, < 0.2.0)
       uber (< 0.2.0)
@@ -854,13 +854,13 @@ GEM
     rspec-retry (0.6.2)
       rspec-core (> 3.3)
     rspec-support (3.11.0)
-    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 (1.18.0)