Bump rubocop from 1.7.0 to 1.8.0 (#12180)

Bumps [rubocop](https://github.com/rubocop-hq/rubocop) from 1.7.0 to 1.8.0.
- [Release notes](https://github.com/rubocop-hq/rubocop/releases)
- [Changelog](https://github.com/rubocop-hq/rubocop/blob/master/CHANGELOG.md)
- [Commits](https://github.com/rubocop-hq/rubocop/compare/v1.7.0...v1.8.0)

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Gemfile

@@ -149,7 +149,7 @@ group :development, :test do
   gem "knapsack_pro", "~> 2.11.0" # Help parallelize Ruby spec builds
   gem "pry-byebug", "~> 3.8" # Combine 'pry' with 'byebug'. Adds 'step', 'next', 'finish', 'continue' and 'break' commands to control execution
   gem "rspec-rails", "~> 4.0" # rspec-rails is a testing framework for Rails 3+
-  gem "rubocop", "~> 1.7", require: false # Automatic Ruby code style checking tool
+  gem "rubocop", "~> 1.8", require: false # Automatic Ruby code style checking tool
   gem "rubocop-performance", "~> 1.9", require: false # A collection of RuboCop cops to check for performance optimizations in Ruby code
   gem "rubocop-rails", "~> 2.9", require: false # Automatic Rails code style checking tool
   gem "rubocop-rspec", "~> 2.1", require: false # Code style checking for RSpec files

Gemfile.lock

@@ -648,15 +648,15 @@ GEM
     rspec-retry (0.6.2)
       rspec-core (> 3.3)
     rspec-support (3.10.1)
-    rubocop (1.7.0)
+    rubocop (1.8.0)
       parallel (~> 1.10)
-      parser (>= 2.7.1.5)
+      parser (>= 3.0.0.0)
       rainbow (>= 2.2.2, < 4.0)
       regexp_parser (>= 1.8, < 3.0)
       rexml
       rubocop-ast (>= 1.2.0, < 2.0)
       ruby-progressbar (~> 1.7)
-      unicode-display_width (>= 1.4.0, < 2.0)
+      unicode-display_width (>= 1.4.0, < 3.0)
     rubocop-ast (1.4.0)
       parser (>= 2.7.1.5)
     rubocop-performance (1.9.2)
@@ -783,7 +783,7 @@ GEM
     unf (0.1.4)
       unf_ext
     unf_ext (0.0.7.7)
-    unicode-display_width (1.7.0)
+    unicode-display_width (2.0.0)
     uniform_notifier (1.13.0)
     validate_url (1.0.13)
       activemodel (>= 3.0.0)
@@ -947,7 +947,7 @@ DEPENDENCIES
   rouge (~> 3.26)
   rspec-rails (~> 4.0)
   rspec-retry (~> 0.6)
-  rubocop (~> 1.7)
+  rubocop (~> 1.8)
   rubocop-performance (~> 1.9)
   rubocop-rails (~> 2.9)
   rubocop-rspec (~> 2.1)