fix(@schematics/angular): Add error handling to bootstrapping logic (#109)

This one is recommended in the style guide. https://angular.io/guide/styleguide#style-02-05 If it's part of the blueprint, it'd be better.

Author: sanspace

packages/schematics/angular/application/files/__path__/main.ts

@@ -8,4 +8,5 @@ if (environment.production) {
   enableProdMode();
 }
 
-platformBrowserDynamic().bootstrapModule(AppModule);
+platformBrowserDynamic().bootstrapModule(AppModule)
+  .catch(err => console.log(err));