docs(lazyLoad): Switch from System.import() to import()

Author: christopherthielen

src/hooks/lazyLoad.ts

@@ -24,7 +24,7 @@ import { StateRule } from '../url/interface';
  * ```
  * .state('abc', {
  *   component: 'fooComponent',
- *   lazyLoad: () => System.import('./fooComponent')
+ *   lazyLoad: () => import('./fooComponent')
  *   });
  * ```
  *

src/state/interface.ts

@@ -563,7 +563,7 @@ export interface StateDeclaration {
    *
    * ```
    * .state('abc', {
-   *   lazyLoad: (transition, state) => System.import('./abcService')
+   *   lazyLoad: (transition, state) => import('./abcService')
    * }
    * ```
    *
@@ -621,7 +621,7 @@ export interface StateDeclaration {
    * {
    *   name: 'parent.**',
    *   url: '/parent',
-   *   lazyLoad: () => System.import('./lazy.states.js')
+   *   lazyLoad: () => import('./lazy.states.js')
    * }
    * ```
    *