react jsx arrow function parsing error

[leecz]

code like:
class App extends component {
handleSomething = () => {
...
}
render(){...}
}

the arrow function will case parse error
this feature is very useful in react , can support this?

[feross]

See https://github.com/feross/standard#can-i-use-a-custom-js-parser-for-bleeding-edge-es-next-support