Merge branch 'rs-update-rubocop' into 'master'

Bump rubocop to 0.42.0

Also updates `.rubocop_todo.yml` for the latest cops.

See merge request !6354

Gemfile

@@ -295,7 +295,7 @@ group :development, :test do
   gem 'spring-commands-spinach',  '~> 1.1.0'
   gem 'spring-commands-teaspoon', '~> 0.0.2'
 
-  gem 'rubocop', '~> 0.41.2', require: false
+  gem 'rubocop', '~> 0.42.0', require: false
   gem 'rubocop-rspec', '~> 1.5.0', require: false
   gem 'scss_lint', '~> 0.47.0', require: false
   gem 'haml_lint', '~> 0.18.2', require: false

Gemfile.lock

@@ -619,7 +619,7 @@ GEM
     rspec-retry (0.4.5)
       rspec-core
     rspec-support (3.5.0)
-    rubocop (0.41.2)
+    rubocop (0.42.0)
       parser (>= 2.3.1.1, < 3.0)
       powerpack (~> 0.1)
       rainbow (>= 1.99.1, < 3.0)
@@ -762,7 +762,7 @@ GEM
     unf (0.1.4)
       unf_ext
     unf_ext (0.0.7.2)
-    unicode-display_width (1.1.0)
+    unicode-display_width (1.1.1)
     unicorn (4.9.0)
       kgio (~> 2.6)
       rack
@@ -944,7 +944,7 @@ DEPENDENCIES
   rqrcode-rails3 (~> 0.1.7)
   rspec-rails (~> 3.5.0)
   rspec-retry (~> 0.4.5)
-  rubocop (~> 0.41.2)
+  rubocop (~> 0.42.0)
   rubocop-rspec (~> 1.5.0)
   ruby-fogbugz (~> 0.2.1)
   ruby-prof (~> 0.15.9)