Fix test broken on ruby 1.9.3 and jruby
Fix test broken on ruby 1.9.3 and jruby

mime-types transistively required by rails, which version >=3 will require ruby >= 2.0

ruby-hyperloop/hyper-react,ruby-hyperloop/hyper-react,ruby-hyperloop/hyper-react,reactrb/reactrb,reactrb/reactrb