Gemfile in with_last-0.1.1 vs Gemfile in with_last-0.2.0

@@ -1,7 +1,12 @@
-source "https://rubygems.org"
+# frozen_string_literal: true
 
+source 'https://rubygems.org'
+
 # Specify your gem's dependencies in array_with_last.gemspec
 gemspec
 
-gem "rake", "~> 12.0"
-gem "rspec", "~> 3.0"
+gem 'byebug'
+gem 'rake', '~> 12.0'
+gem 'rspec', '~> 3.0'
+
+gem 'rubocop', '~> 0.80.0'