When using `window.onerror` in the bootstrap script that is hosted in a CDN the error message will show `"Script error."` instead of a proper error message. This is because of the [cross-origin](https://blog.sentry.io/2016/05/17/what-is-script-error/) script. To fix this issue a `crossorigin="anonymous"` attribute needs to be added in the script tag.

Currently, `bootstrapScripts` supports [`src` and `integrity`](https://github.com/facebook/react/blob/0fce6bb498357feb4465859912004b2e20fe7084/packages/react-dom-bindings/src/server/ReactDOMServerFormatConfig.js#L226) as configurations, should it also supports a `crossorigin` property?


function flattenOptionChildren(children: mixed): string {
  let content = '';
  
  
  Children.forEach((children: any), function (child) {
    if (child == null) {
      return;
    }
    content += (child: any);
    if (__DEV__) {
      if (
        !didWarnInvalidOptionChildren &&
        typeof child !== 'string' &&
        typeof child !== 'number'
      ) {
        didWarnInvalidOptionChildren = true;
        console.error(
          'Cannot infer the option value of complex children. ' +
            'Pass a `value` prop or use a plain string as children to <option>.',
        );
      }
    }
  });
  return content;
}
const selectedMarkerAttribute = stringToPrecomputedChunk(' selected=""');
function pushStartOption(
  target: Array<Chunk | PrecomputedChunk>,
  props: Object,
  formatContext: FormatContext,