Gemfile in feedjira-3.1.1 vs Gemfile in feedjira-3.1.2

@@ -1,12 +1,14 @@
+# frozen_string_literal: true
+
 source "https://rubygems.org/"
 
 gemspec
 
 gem "pry"
-gem "rubocop", "~> 0.59.2"
+gem "rubocop", "~> 0.90"
 
 group :test do
   gem "oga"
-  gem "ox", platforms: [:mri, :rbx]
+  gem "ox", platforms: %i[mri rbx]
   gem "rake"
 end