Bump rubocop from 1.21.0 to 1.22.0

Bumps [rubocop](https://github.com/rubocop/rubocop) from 1.21.0 to 1.22.0.
- [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/v1.21.0...v1.22.0)

---
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

@@ -549,16 +549,16 @@ GEM
     rswag-ui (2.4.0)
       actionpack (>= 3.1, < 7.0)
       railties (>= 3.1, < 7.0)
-    rubocop (1.21.0)
+    rubocop (1.22.0)
       parallel (~> 1.10)
       parser (>= 3.0.0.0)
       rainbow (>= 2.2.2, < 4.0)
       regexp_parser (>= 1.8, < 3.0)
       rexml
-      rubocop-ast (>= 1.9.1, < 2.0)
+      rubocop-ast (>= 1.12.0, < 2.0)
       ruby-progressbar (~> 1.7)
       unicode-display_width (>= 1.4.0, < 3.0)
-    rubocop-ast (1.11.0)
+    rubocop-ast (1.12.0)
       parser (>= 3.0.1.1)
     rubocop-rails (2.12.2)
       activesupport (>= 4.2.0)
@@ -635,7 +635,7 @@ GEM
       concurrent-ruby (~> 1.0)
     uglifier (4.2.0)
       execjs (>= 0.3.0, < 3)
-    unicode-display_width (2.0.0)
+    unicode-display_width (2.1.0)
     uniform_notifier (1.14.2)
     valid_email2 (4.0.0)
       activemodel (>= 3.2)