Bump rubocop from 0.74.0 to 0.78.0

Bumps [rubocop](https://github.com/rubocop-hq/rubocop) from 0.74.0 to 0.78.0.
- [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/v0.74.0...v0.78.0)

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

Gemfile

@@ -62,7 +62,7 @@ end
 group :development, :test do
   gem 'byebug'
   gem 'listen'
-  gem "rubocop", "~> 0.74", require: false
+  gem "rubocop", "~> 0.78", require: false
 end
 
 group :test do

Gemfile.lock

@@ -105,7 +105,7 @@ GEM
     htmlentities (4.3.4)
     i18n (1.7.0)
       concurrent-ruby (~> 1.0)
-    jaro_winkler (1.5.3)
+    jaro_winkler (1.5.4)
     jquery-rails (4.3.5)
       rails-dom-testing (>= 1, < 3)
       railties (>= 4.2.0)
@@ -149,8 +149,8 @@ GEM
       mime-types
       mimemagic (~> 0.3.0)
       terrapin (~> 0.6.0)
-    parallel (1.17.0)
-    parser (2.6.3.0)
+    parallel (1.19.1)
+    parser (2.7.0.1)
       ast (~> 2.4.0)
     puma (4.3.1)
       nio4r (~> 2.0)
@@ -199,7 +199,7 @@ GEM
       diff-lcs (>= 1.2.0, < 2.0)
       rspec-support (~> 3.8.0)
     rspec-support (3.8.2)
-    rubocop (0.74.0)
+    rubocop (0.78.0)
       jaro_winkler (~> 1.5.1)
       parallel (~> 1.10)
       parser (>= 2.6)
@@ -303,7 +303,7 @@ DEPENDENCIES
   rails-dom-testing (~> 2.0.0)
   rails_autolink
   rspec-expectations
-  rubocop (~> 0.74)
+  rubocop (~> 0.78)
   sanitize (~> 5.0)
   sass-rails (~> 5.0)
   selenium-webdriver (~> 3.142)