Bump rubocop-rails from 2.17.4 to 2.18.0

Bumps [rubocop-rails](https://github.com/rubocop/rubocop-rails) from 2.17.4 to 2.18.0.
- [Release notes](https://github.com/rubocop/rubocop-rails/releases)
- [Changelog](https://github.com/rubocop/rubocop-rails/blob/master/CHANGELOG.md)
- [Commits](https://github.com/rubocop/rubocop-rails/compare/v2.17.4...v2.18.0)

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

Signed-off-by: dependabot[bot] <support@github.com>

Gemfile

@@ -93,7 +93,7 @@ group :development, :test do
   gem "rspec-rails", "~> 6.0"
   gem "rspec-sidekiq", "~> 3.0", require: false
   gem "rubocop", "~> 1.45"
-  gem "rubocop-rails", "~> 2.17"
+  gem "rubocop-rails", "~> 2.18"
   gem "shoulda-matchers", "~> 5.3"
   gem "simplecov", require: false
   gem "simplecov-cobertura", require: false

Gemfile.lock

@@ -104,7 +104,7 @@ GEM
     chunky_png (1.4.0)
     coderay (1.1.3)
     colorize (0.8.1)
-    concurrent-ruby (1.2.0)
+    concurrent-ruby (1.2.2)
     connection_pool (2.3.0)
     crass (1.0.6)
     cssbundling-rails (1.1.2)
@@ -391,7 +391,7 @@ GEM
       unicode-display_width (>= 2.4.0, < 3.0)
     rubocop-ast (1.26.0)
       parser (>= 3.2.1.0)
-    rubocop-rails (2.17.4)
+    rubocop-rails (2.18.0)
       activesupport (>= 4.2.0)
       rack (>= 1.1)
       rubocop (>= 1.33.0, < 2.0)
@@ -542,7 +542,7 @@ DEPENDENCIES
   rspec-rails (~> 6.0)
   rspec-sidekiq (~> 3.0)
   rubocop (~> 1.45)
-  rubocop-rails (~> 2.17)
+  rubocop-rails (~> 2.18)
   ruby-progressbar
   rubyzip (~> 2.3)
   sanitize