ES6 quoted propTypes not working

[kl3ryk]

When defining ES6 compatibile propTypes with qoted properties there is an error

export default class OfferList extends React.Component {
    render() {
        //...
    }
}

OfferList.propTypes = {
    "items": React.PropTypes.array.isRequired
};

When propety is unquoted everything works fine:

export default class OfferList extends React.Component {
    render() {
        //..
    }
}

OfferList.propTypes = {
    items: React.PropTypes.array.isRequired
};

[kl3ryk]

I think bug is here: https://github.com/yannickcr/eslint-plugin-react/blob/master/lib/rules/prop-types.js#L168 becuase there is no name property.