Update dependencies list to include Node.
Update dependencies list to include Node.

Heroku added Node to the ruby buildpack in https://github.com/heroku/heroku-buildpack-ruby/commit/7d86d5d629006a3858ee6272895ebd5fde5f88db

[#77843004]

jumptvs/BP_Ruby,jumptvs/BP_Ruby,cloudfoundry/ruby-buildpack,Jonty/ruby-buildpack,ibmdb/db2rubybuildpack,hpcloud/ruby-buildpack,sky-uk/ruby-buildpack,ablease/custom-buildpack,fcruxen/ruby-buildpack,iamjarvo/ruby-buildpack,ablease/custom-buildpack,takii/db2rubybuildpack,ablease/custom-buildpack,ekaranto/rails4-bluemix-buildpack,jumptvs/BP_Ruby,cloudn/buildpack-ruby,cloudfoundry/ruby-buildpack,takii/db2rubybuildpack,cloudn/buildpack-ruby,takii/db2rubybuildpack,sky-uk/ruby-buildpack,Jonty/ruby-buildpack,sky-uk/ruby-buildpack,Altoros/ruby-buildpack,iamjarvo/ruby-buildpack,bskyb-commerce/ruby-buildpack,hatofmonkeys/ruby-testing-buildpack,Jonty/ruby-buildpack,CPPWind/ruby-buildpack,Altoros/ruby-buildpack,iamjarvo/ruby-buildpack,hpcloud/ruby-buildpack,ekaranto/rails4-bluemix-buildpack,jumptvs/BP_Ruby,fcruxen/ruby-buildpack,Jonty/ruby-buildpack,ekaranto/rails4-bluemix-buildpack,cloudn/buildpack-ruby,cloudfoundry/ruby-buildpack,hatofmonkeys/ruby-testing-buildpack,CPPWind/ruby-buildpack,ibmdb/db2rubybuildpack,fcruxen/ruby-buildpack,ibmdb/db2rubybuildpack,Altoros/ruby-buildpack,hatofmonkeys/ruby-testing-buildpack,cloudfoundry/ruby-buildpack,cloudfoundry/ruby-buildpack,Scalingo/ruby-buildpack,hpcloud/ruby-buildpack,bskyb-commerce/ruby-buildpack,Scalingo/ruby-buildpack,Altoros/ruby-buildpack,iamjarvo/ruby-buildpack,hpcloud/ruby-buildpack,bskyb-commerce/ruby-buildpack,CPPWind/ruby-buildpack,ablease/custom-buildpack,CPPWind/ruby-buildpack,ekaranto/rails4-bluemix-buildpack,takii/db2rubybuildpack,cloudn/buildpack-ruby,bskyb-commerce/ruby-buildpack,fcruxen/ruby-buildpack,sky-uk/ruby-buildpack