(PUP-1281) Don't use win32console if ruby v2

 - This is the first part of what is needed for PUP-1281. The rest of this will
be worked on based on  PUP-2777 (support bundler workflow). The work going into
that will be something like the following:

platform(:mingw_19) do
  gem 'win32console', '~> 1.3.2', :require => false
end

This will keep win32console from being loaded when using ruby v2.