title: React Start Kit unexpected token export function format(time OSX)
body: <p>I'm trying to use:
  <a href="https://github.com/kriasoft/react-starter-kit/blob/master/docs/getting-started.md" rel="nofollow noreferrer">https://github.com/kriasoft/react-starter-kit/blob/master/docs/getting-started.md</a></p>
  
  <p>it works on my windows machine, but on OSX I'm getting the following: </p>
  
  <p>/data/dev/zmern/react-starter-kit/tools/run.js:10
  export function format(time) {
  ^^^^^^</p>
  
  <p>SyntaxError: Unexpected token export</p>
  
  <p>what could the issue be in osx? </p>