chore(pkg): gulp-clean-css 3.7.0, webpack 3.3.0, serialize-javascript 1.4.0
chore(pkg): gulp-clean-css 3.7.0, webpack 3.3.0, serialize-javascript 1.4.0

localnerve/react-pwa-reference,localnerve/react-pwa-boilerplate,localnerve/react-pwa-reference,localnerve/react-pwa-boilerplate