Fix mix of import and module.exports
Fix mix of import and module.exports

Build with webpack will raise `Cannot assign to read only property 'exports' of object '#<Object>' (mix require and export)`, see https://github.com/webpack/webpack/issues/4039#issuecomment-273804003.
martinezguillaume/react-native-elements,kosiakMD/react-native-elements,react-native-community/React-Native-Elements,kosiakMD/react-native-elements