rails50.gemfile in capybara-screenshot-diff-1.4.0

- old
+ new

@@ -1,5 +1,6 @@
 # frozen_string_literal: true
 
-eval File.read("#{__dir__}/common.gemfile")
+gems = "#{File.dirname __dir__}/gems.rb"
+eval File.read(gems), binding, gems
 
-gem 'actionpack', '~>5.0.1'
+gem "actionpack", "~>5.0.1"