chore(package): update babel-core to version 6.11.4
chore(package): update babel-core to version 6.11.4

https://greenkeeper.io/
deanslamajr/trakta.co,LorbusChris/react-universally,oyeanuj/react-universally,igorsvee/react-ssr,diondirza/react-universally,pebie/react-universally-node-config,kennethtruong/react-webapp,ueno-llc/starter-kit-universally,ctrlplusb/react-universally,sergiokopplin/react-universally,ueno-llc/starter-kit-universally,brettsnaidero/bsd