Fix export.

lazy-imports.js

@@ -32,7 +32,7 @@ This program is available under Apache License Version 2.0
  * So, if for example your route is /user/settings you need to split
  * the path to [ 'user', 'settings' ] and feed it to the _lazyImport function.
 */
-export default class {
+export const LazyImports = class {
   constructor(lazyMap) {
     this.lazyMap = lazyMap;
   }