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?


precedences: Map<string, Set<StyleResource>>,
  stylePrecedences: Map<string, StyleTagResource>,
  scripts: Set<ScriptResource>,
  explicitStylesheetPreloads: Set<PreloadResource>,
  
  explicitScriptPreloads: Set<PreloadResource>,
  explicitOtherPreloads: Set<PreloadResource>,
  
  boundaryResources: ?BoundaryResources,
  ...
};
export function createResources(): Resources {
  return {
    
    preloadsMap: new Map(),
    preconnectsMap: new Map(),
    stylesMap: new Map(),
    scriptsMap: new Map(),
    
    preconnects: new Set(),
    fontPreloads: new Set(),
    
    precedences: new Map(),
    stylePrecedences: new Map(),
    scripts: new Set(),
    explicitStylesheetPreloads: new Set(),
    
    explicitScriptPreloads: new Set(),
    explicitOtherPreloads: new Set(),