build: Use prettier for typescript

Stop ignoring .ts files in prettier and fix existing issues.

src/test.ts

@@ -5,18 +5,12 @@
 
 import 'zone.js/dist/zone-testing';
 import { getTestBed } from '@angular/core/testing';
-import {
-  BrowserDynamicTestingModule,
-  platformBrowserDynamicTesting
-} from '@angular/platform-browser-dynamic/testing';
+import { BrowserDynamicTestingModule, platformBrowserDynamicTesting } from '@angular/platform-browser-dynamic/testing';
 
 declare const require: any;
 
 // First, initialize the Angular testing environment.
-getTestBed().initTestEnvironment(
-  BrowserDynamicTestingModule,
-  platformBrowserDynamicTesting()
-);
+getTestBed().initTestEnvironment(BrowserDynamicTestingModule, platformBrowserDynamicTesting());
 // Then we find all the tests.
 const context = require.context('./', true, /\.spec\.ts$/);
 // And load the modules.