Update rubocop requirement from ~> 0.86.0 to ~> 0.87.0

Updates the requirements on [rubocop](https://github.com/rubocop-hq/rubocop) to permit the latest version.
- [Release notes](https://github.com/rubocop-hq/rubocop/releases)
- [Changelog](https://github.com/rubocop-hq/rubocop/blob/master/CHANGELOG.md)
- [Commits](rubocop/rubocop@v0.86.0...v0.87.0)

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

client_side_validations.gemspec

@@ -36,7 +36,7 @@ Gem::Specification.new do |spec|
   spec.add_development_dependency 'minitest', '~> 5.14'
   spec.add_development_dependency 'mocha', '~> 1.11'
   spec.add_development_dependency 'rake', '~> 13.0'
-  spec.add_development_dependency 'rubocop', '~> 0.86.0'
+  spec.add_development_dependency 'rubocop', '~> 0.87.0'
   spec.add_development_dependency 'rubocop-performance', '~> 1.6'
   spec.add_development_dependency 'rubocop-rails', '~> 2.6'
   spec.add_development_dependency 'simplecov', '~> 0.18.5'

test/action_view/models/post.rb

@@ -6,7 +6,7 @@ class Post
   include ActiveModel::Validations
   include ActiveModel::Conversion
 
-  attr_accessor :title, :author_name, :body, :secret, :written_on, :cost
+  attr_accessor :title, :author_name, :body, :secret, :written_on, :cost, :comments, :comment_ids, :category, :category_id, :tags, :tag_ids
 
   validates :cost, :body, presence: true
   validates :body, length: { minimum: 200 }
@@ -25,15 +25,9 @@ def persisted?
     false
   end
 
-  attr_accessor :comments, :comment_ids
-
   def comments_attributes=(attributes); end
 
-  attr_accessor :category, :category_id
-
   def category_attributes=(attributes); end
 
-  attr_accessor :tags, :tag_ids
-
   def tags_attributes=(attributes); end
 end

test/javascript/server.rb

@@ -25,7 +25,7 @@ def call(env)
 end
 
 use AssetPath, urls: ['/vendor/assets/javascripts'], root: File.expand_path('../..', settings.root)
-use AssetPath, urls: ['/vendor/assets/javascripts'], root: File.expand_path('../', $LOAD_PATH.find { |p| p =~ /jquery-rails/ })
+use AssetPath, urls: ['/vendor/assets/javascripts'], root: File.expand_path('../', $LOAD_PATH.find { |p| p.include?('jquery-rails') })
 
 DEFAULT_JQUERY_VERSION = '3.5.1'
 QUNIT_VERSION          = '2.9.2'