test(ngmodule): update to ngmodule

src/components/button/test/basic/app-module.ts

@@ -1,11 +1,11 @@
-import { Component } from '@angular/core';
-import { App, ionicBootstrap } from '../../../../../src';
+import { NgModule, Component } from '@angular/core';
+import { IonicApp, IonicModule, App } from '../../../..';
 
 
 @Component({
   templateUrl: 'main.html'
 })
-class E2EPage {
+export class E2EPage {
   btnColor: string;
   testingColors = ['primary', 'secondary', 'danger', 'dark'];
   testingColorIndex = 0;
@@ -25,8 +25,22 @@ class E2EPage {
 @Component({
   template: '<ion-nav [root]="rootPage"></ion-nav>'
 })
-class E2EApp {
+export class E2EApp {
   rootPage = E2EPage;
 }
 
-ionicBootstrap(E2EApp);
+
+@NgModule({
+  declarations: [
+    E2EApp,
+    E2EPage
+  ],
+  imports: [
+    IonicModule.forRoot(E2EApp)
+  ],
+  bootstrap: [IonicApp],
+  entryComponents: [
+    E2EPage
+  ]
+})
+export class AppModule {}