Upgrade: Bump rubocop-rails from 2.21.1 to 2.22.1

Bumps [rubocop-rails](https://github.com/rubocop/rubocop-rails) from 2.21.1 to 2.22.1.
- [Release notes](https://github.com/rubocop/rubocop-rails/releases)
- [Changelog](https://github.com/rubocop/rubocop-rails/blob/master/CHANGELOG.md)
- [Commits](rubocop/rubocop-rails@v2.21.1...v2.22.1)

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

Signed-off-by: dependabot[bot] <[email protected]>

Gemfile

@@ -52,7 +52,7 @@ group :development do
   gem 'rack-mini-profiler'
   gem 'rubocop', '~> 1.56', require: false
   gem 'rubocop-performance', '~> 1.19', require: false
-  gem 'rubocop-rails', '~> 2.21', require: false
+  gem 'rubocop-rails', '~> 2.22', require: false
   gem 'rubocop-rspec', '~> 2.24', require: false
   gem 'web-console', '~> 4.2'
 end

Gemfile.lock

@@ -461,7 +461,7 @@ GEM
       rubocop-ast (>= 1.28.1, < 2.0)
       ruby-progressbar (~> 1.7)
       unicode-display_width (>= 2.4.0, < 3.0)
-    rubocop-ast (1.29.0)
+    rubocop-ast (1.30.0)
       parser (>= 3.2.1.0)
     rubocop-capybara (2.19.0)
       rubocop (~> 1.41)
@@ -470,7 +470,7 @@ GEM
     rubocop-performance (1.19.1)
       rubocop (>= 1.7.0, < 2.0)
       rubocop-ast (>= 0.4.0)
-    rubocop-rails (2.21.1)
+    rubocop-rails (2.22.1)
       activesupport (>= 4.2.0)
       rack (>= 1.1)
       rubocop (>= 1.33.0, < 2.0)
@@ -632,7 +632,7 @@ DEPENDENCIES
   rspec_junit_formatter (~> 0.6)
   rubocop (~> 1.56)
   rubocop-performance (~> 1.19)
-  rubocop-rails (~> 2.21)
+  rubocop-rails (~> 2.22)
   rubocop-rspec (~> 2.24)
   ruby-progressbar (~> 1.13)
   sass-rails (~> 6.0)