update dependency. jquery-rails
update dependency. mocha
as per the Mocha 0.14.0 README (link provided --
https://github.com/freerange/mocha/blob/084e5015116d24ba3e1d7f185ea91a70879aaf17/README.md#rails),
require mocha/setup at the end of test_helper.rb
after require test_unit has been invoked.
solely rely on dependencies defined in gemspec