setup_react_webpacker

in lib/generators/react/install_generator.rb [103:111]

• 8 lines of code
• 2 McCabe index (conditional complexity)

      def setup_react_webpacker
        `yarn add react_ujs`
        if manifest.exist?
          append_file(manifest, WEBPACKER_SETUP_UJS)
        else
          create_file(manifest, WEBPACKER_SETUP_UJS)
        end
      end