Bump rubocop-rails from 2.27.0 to 2.28.0 (#1152)

Bumps [rubocop-rails](https://github.com/rubocop/rubocop-rails) from 2.27.0 to 2.28.0.
- [Release notes](https://github.com/rubocop/rubocop-rails/releases)
- [Changelog](https://github.com/rubocop/rubocop-rails/blob/master/CHANGELOG.md)
- [Commits](rubocop/rubocop-rails@v2.27.0...v2.28.0)

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

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

Gemfile.lock

@@ -237,7 +237,7 @@ GEM
       thor (>= 0.14, < 2.0)
     jquery-ui-rails (7.0.0)
       railties (>= 3.2.16)
-    json (2.9.0)
+    json (2.9.1)
     json-jwt (1.16.7)
       activesupport (>= 4.2)
       aes_key_wrap
@@ -423,7 +423,7 @@ GEM
       ffi (~> 1.0)
     rdoc (6.10.0)
       psych (>= 4.0.0)
-    regexp_parser (2.9.3)
+    regexp_parser (2.10.0)
     reline (0.6.0)
       io-console (~> 0.5)
     responders (3.1.1)
@@ -442,11 +442,11 @@ GEM
       rubocop-ast (>= 1.36.2, < 2.0)
       ruby-progressbar (~> 1.7)
       unicode-display_width (>= 2.4.0, < 4.0)
-    rubocop-ast (1.36.2)
+    rubocop-ast (1.37.0)
       parser (>= 3.3.1.0)
     rubocop-capybara (2.21.0)
       rubocop (~> 1.41)
-    rubocop-rails (2.27.0)
+    rubocop-rails (2.28.0)
       activesupport (>= 4.2.0)
       rack (>= 1.1)
       rubocop (>= 1.52.0, < 2.0)