[ADF-2147] test upgrade 2.0.0 (#2902)

* add integration 2.0.0 test

* update readme

* add integration test in travis

* restore tsconfig.dev

* fix test script travis call

* improve script

* fix npm run test

integration/base_ver_2_app/src/main.ts

@@ -0,0 +1,16 @@
+import { enableProdMode } from '@angular/core';
+import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
+
+import { AppModule } from './app/app.module';
+import { environment } from './environments/environment';
+
+import 'hammerjs';
+
+import pdfjsLib from 'pdfjs-dist';
+pdfjsLib.PDFJS.workerSrc = 'pdf.worker.js';
+
+if (environment.production) {
+  enableProdMode();
+}
+
+platformBrowserDynamic().bootstrapModule(AppModule);