Gemfile in test_diff-0.3.4 vs Gemfile in test_diff-0.4.0

@@ -1,4 +1,6 @@
 source 'https://rubygems.org'
 
 # Specify your gem's dependencies in test_diff.gemspec
 gemspec
+
+gem 'rubocop', RUBY_VERSION >= '2.0.0' ? '~> 0.48.0' : '~> 0.41.2'