Bump rubocop from 0.87.1 to 0.89.0

Bumps [rubocop](https://github.com/rubocop-hq/rubocop) from 0.87.1 to 0.89.0.
- [Release notes](https://github.com/rubocop-hq/rubocop/releases)
- [Changelog](https://github.com/rubocop-hq/rubocop/blob/master/CHANGELOG.md)
- [Commits](rubocop/rubocop@v0.87.1...v0.89.0)

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

Gemfile

@@ -25,7 +25,7 @@ group :development, :test do
   gem 'colored', require: false
   gem 'pry-byebug', platform: :mri
   gem 'rake'
-  gem 'rubocop', '~> 0.87.1', require: false
+  gem 'rubocop', '~> 0.89.0', require: false
   gem 'rubocop-rails', require: false
   gem 'rubocop-rspec', require: false
 end

Gemfile.lock

@@ -185,7 +185,7 @@ GEM
       rspec-mocks (~> 3.9)
       rspec-support (~> 3.9)
     rspec-support (3.9.3)
-    rubocop (0.87.1)
+    rubocop (0.89.0)
       parallel (~> 1.10)
       parser (>= 2.7.1.1)
       rainbow (>= 2.2.2, < 4.0)
@@ -194,8 +194,8 @@ GEM
       rubocop-ast (>= 0.1.0, < 1.0)
       ruby-progressbar (~> 1.7)
       unicode-display_width (>= 1.4.0, < 2.0)
-    rubocop-ast (0.2.0)
-      parser (>= 2.7.0.1)
+    rubocop-ast (0.3.0)
+      parser (>= 2.7.1.4)
     rubocop-rails (2.7.1)
       activesupport (>= 4.2.0)
       rack (>= 1.1)
@@ -261,7 +261,7 @@ DEPENDENCIES
   rake
   rspec-expectations
   rspec-rails
-  rubocop (~> 0.87.1)
+  rubocop (~> 0.89.0)
   rubocop-rails
   rubocop-rspec
   shoulda-matchers