Change the promise in the bootstrap to a done callback

Author: hdeshev

tests/app/tests/bootstrap.ts

@@ -13,9 +13,10 @@ export class SimpleApp {
 
 describe('bootstrap', () => {
     describe('start app', () => {
-        it('SimpleApp bootstrapped', () => {
+        it('SimpleApp bootstrapped', (done) => {
             return bootstrap(SimpleApp).then((componentRef) => {
                 assert.isTrue(SimpleApp === componentRef.componentType);
+                done();
             });
         });
     });