common.gemfile in capybara-screenshot-diff-1.0.0

- old
+ new

@@ -1,9 +1,12 @@
+# frozen_string_literal: true
+
 source 'https://rubygems.org'
 
 gem 'capybara', '~> 2.0'
 gem 'chunky_png', '~> 1.3'
 gem 'minitest', '~> 5.0'
 gem 'minitest-reporters'
 gem 'rake'
 gem 'rubocop', '~> 0.39'
+gem 'rubocop-performance', '~> 0.0'
 gem 'simplecov', '~> 0.11'