Gemfile in money_helper-2.0.0 vs Gemfile in money_helper-3.0.0

@@ -1,5 +1,8 @@
+# frozen_string_literal: true
+
 source 'http://rubygems.org'
 
 gemspec
 
-gem 'rubocop', '0.67.2'
+# pinned so that the lock files stay in sync
+gem 'rubocop', '1.21.0'