Bump rubocop-rails from 2.21.2 to 2.22.2

Bumps [rubocop-rails](https://github.com/rubocop/rubocop-rails) from 2.21.2 to 2.22.2.
- [Release notes](https://github.com/rubocop/rubocop-rails/releases)
- [Changelog](https://github.com/rubocop/rubocop-rails/blob/master/CHANGELOG.md)
- [Commits](rubocop/rubocop-rails@v2.21.2...v2.22.2)

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

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

Gemfile

@@ -160,7 +160,7 @@ group :development, :test do
   gem "rubocop"
   # Rails add-on for static analysis.
   gem 'rubocop-performance'
-  gem "rubocop-rails", "~> 2.21.2"
+  gem "rubocop-rails", "~> 2.22.2"
   # Default rules for Rubocop.
   gem "standard", "~> 1.32"
 end

Gemfile.lock

@@ -534,10 +534,11 @@ GEM
     rubocop-performance (1.19.1)
       rubocop (>= 1.7.0, < 2.0)
       rubocop-ast (>= 0.4.0)
-    rubocop-rails (2.21.2)
+    rubocop-rails (2.22.2)
       activesupport (>= 4.2.0)
       rack (>= 1.1)
       rubocop (>= 1.33.0, < 2.0)
+      rubocop-ast (>= 1.30.0, < 2.0)
     ruby-graphviz (1.2.5)
       rexml
     ruby-progressbar (1.13.0)
@@ -724,7 +725,7 @@ DEPENDENCIES
   rspec-retry
   rubocop
   rubocop-performance
-  rubocop-rails (~> 2.21.2)
+  rubocop-rails (~> 2.22.2)
   rufus-scheduler
   sass-rails
   selenium-webdriver (~> 4.10)