Update .travis.yml for webpack.server.config.js
Update .travis.yml for webpack.server.config.js

shakacode/react-webpack-rails-tutorial,thiagoc7/react-webpack-rails-tutorial,jeffthemaximum/jeffline,cacheflow/react-webpack-rails-tutorial,jeffthemaximum/Teachers-Dont-Pay-Jeff,justin808/react-webpack-rails-tutorial,justin808/react-webpack-rails-tutorial,shakacode/react-webpack-rails-tutorial,shunwen/react-webpack-rails-tutorial,phosphene/react-on-rails-cherrypick,cacheflow/react-webpack-rails-tutorial,thiagoc7/react-webpack-rails-tutorial,shunwen/react-webpack-rails-tutorial,thiagoc7/react-webpack-rails-tutorial,suzukaze/react-webpack-rails-tutorial,jeffthemaximum/Teachers-Dont-Pay-Jeff,phosphene/react-on-rails-cherrypick,shunwen/react-webpack-rails-tutorial,jeffthemaximum/jeffline,shakacode/react-webpack-rails-tutorial,justin808/react-webpack-rails-tutorial,shunwen/react-webpack-rails-tutorial,roxolan/react-webpack-rails-tutorial,shakacode/react-webpack-rails-tutorial,roxolan/react-webpack-rails-tutorial,suzukaze/react-webpack-rails-tutorial,jeffthemaximum/jeffline,mscienski/stpauls,justin808/react-webpack-rails-tutorial,roxolan/react-webpack-rails-tutorial,phosphene/react-on-rails-cherrypick,jeffthemaximum/jeffline,phosphene/react-on-rails-cherrypick,cacheflow/react-webpack-rails-tutorial,jeffthemaximum/jeffline,szyablitsky/react-webpack-rails-tutorial,roxolan/react-webpack-rails-tutorial,mscienski/stpauls,jeffthemaximum/Teachers-Dont-Pay-Jeff,cacheflow/react-webpack-rails-tutorial,jeffthemaximum/Teachers-Dont-Pay-Jeff,thiagoc7/react-webpack-rails-tutorial,suzukaze/react-webpack-rails-tutorial,szyablitsky/react-webpack-rails-tutorial,jeffthemaximum/Teachers-Dont-Pay-Jeff,suzukaze/react-webpack-rails-tutorial,szyablitsky/react-webpack-rails-tutorial,szyablitsky/react-webpack-rails-tutorial