feat: Support default exports

[brandonroberts]

When lazy loading NgModules and Components, support loading them without the .then and allow them to be exported as default.

import { Component } from '@angular/core';

@Component({
 template: `
 <router>
 <route path="/lazy" [load]="components.lazy"> </route>
 </router>
 `,
})
export class MyComponent {
 components = {
 lazy: () => import('./lazy/lazy.component')
 };
}