build: update to angular-v9.1.12 (#1215)

Fixes: #1216

src/main.ts

@@ -7,9 +7,6 @@
 import { enableProdMode } from '@angular/core';
 import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
 
-/** Provides gesture support for angular-material components */
-import 'hammerjs';
-
 import { AppModule } from './app/app.module';
 import { environment } from './environments/environment';