fix(webpack_config/client/webpack.prod.babel.js): fix output path, add safeToUseOptionalCaches for OfflinePlugin
fix(webpack_config/client/webpack.prod.babel.js): fix output path, add safeToUseOptionalCaches for OfflinePlugin

billymcintosh/react-semantic.ui-starter,Metnew/react-semantic.ui-starter,versi786/parts-checkout,billymcintosh/react-semantic.ui-starter,versi786/parts-checkout