udpate angular core and cli to 15

pdb-js/src/app/app-routing.module.ts

@@ -16,7 +16,7 @@ const routes: Routes = [
 
 @NgModule({
   imports: [
-    RouterModule.forRoot(routes, { relativeLinkResolution: 'legacy' })
+    RouterModule.forRoot(routes, {})
   ],
   //declarations: [VisualizationPageComponent],
   declarations: [],

pdb-js/src/test.ts

@@ -7,20 +7,8 @@ import {
   platformBrowserDynamicTesting
 } from '@angular/platform-browser-dynamic/testing';
 
-declare const require: {
-  context(path: string, deep?: boolean, filter?: RegExp): {
-    <T>(id: string): T;
-    keys(): string[];
-  };
-};
-
 // First, initialize the Angular testing environment.
 getTestBed().initTestEnvironment(
   BrowserDynamicTestingModule,
   platformBrowserDynamicTesting(),
 );
-
-// Then we find all the tests.
-const context = require.context('./', true, /\.spec\.ts$/);
-// And load the modules.
-context.keys().map(context);