Setup spectator tests

app.component.spec.ts

import { AppComponent } from './app.component';
import { Spectator, createComponentFactory } from '@ngneat/spectator';
import { GithubService } from './github.service';

describe('AppComponentSpectator', () => {
  let spectator: Spectator<AppComponent>;
  const createComponent = createComponentFactory({
    component: AppComponent,
    providers: [
      { provide: GithubService, useValue: {} }
    ],
  });
  
  beforeEach(() => spectator = createComponent());

  it('should create', () => {
    expect(spectator.component).toBeTruthy();
  });
});