Add caching for faster builds (#656)
Add caching for faster builds (#656)

* Use node 6

* Add caching for faster builds

mitchrosu/react-datepicker,BrunoAlcides/react-datepicker,lmenus/react-datepicker,BrunoAlcides/react-datepicker,Hacker0x01/react-datepicker,Hacker0x01/react-datepicker,lmenus/react-datepicker,BrunoAlcides/react-datepicker,Hacker0x01/react-datepicker,lmenus/react-datepicker,mitchrosu/react-datepicker,mitchrosu/react-datepicker