update gems in order to make it work with ruby 1.9.3

spec/spec_helper.rb

@@ -42,6 +42,7 @@ RSpec.configure do |config|
   config.before do
     if example.metadata[:js]
       DatabaseCleaner.strategy = :truncation
+      Capybara::Selenium::Driver::DEFAULT_OPTIONS[:resynchronize] = true
     else
       DatabaseCleaner.strategy = :transaction
     end