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

@@ -52,7 +52,7 @@ end
 group :development, :test do
   gem 'byebug'
   gem 'listen'
-  gem 'rubocop', '~> 1.21', require: false
+  gem 'rubocop', '~> 1.22', require: false
 end
 
 group :test do

Gemfile.lock

@@ -230,16 +230,16 @@ GEM
       diff-lcs (>= 1.2.0, < 2.0)
       rspec-support (~> 3.10.0)
     rspec-support (3.10.1)
-    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)
     ruby-progressbar (1.11.0)
     safe_yaml (1.0.5)
@@ -348,7 +348,7 @@ DEPENDENCIES
   rails-dom-testing (~> 2.0.0)
   rails_autolink
   rspec-expectations
-  rubocop (~> 1.21)
+  rubocop (~> 1.22)
   sanitize (~> 6.0)
   sassc-rails (~> 2.1.2)
   simplecov