fix(module export): implemented a forRoot method

src/star-rating.module.ts

@@ -1,19 +1,23 @@
-import { NgModule } from '@angular/core';
+import { ModuleWithProviders, NgModule } from '@angular/core';
 import { CommonModule } from '@angular/common';
-import { StarRatingComponent } from "./star-rating.component";
-import { StarRatingConfig } from "./star-rating-config"
+import { StarRatingComponent } from './star-rating.component';
+import { StarRatingConfig } from './star-rating-config';
 
-export{ StarRatingComponent} from "./star-rating.component";
-export { StarRatingConfig } from "./star-rating-config"
+export{ StarRatingComponent } from './star-rating.component';
+export { StarRatingConfig } from './star-rating-config'
 
-const EXPORTS = [ StarRatingComponent ];
+const EXPORTS = [StarRatingComponent];
 
 @NgModule({
-  imports: [ CommonModule ],
-  exports:      [ EXPORTS ],
-  declarations: [ EXPORTS ],
-  providers: [ StarRatingConfig ]
+    imports: [CommonModule],
+    exports: [EXPORTS],
+    declarations: [EXPORTS]
 })
 export class StarRatingModule {
-
+    static forRoot(): ModuleWithProviders {
+        return {
+            ngModule: StarRatingModule,
+            providers: [StarRatingConfig]
+        }
+    }
 }