Add a autocomplete option

[gparlakov-vmware]

When on a dependency - add that dependency to the spec
when on a method - add a test case for that method to the spec

Add a per-type processing

i.e. for

• GraphQL error handler make the default always add a mockReturnValue(x => x)
• GraphQL Response - mock with the {fetch: jest.fn().mockReturnValue(fetch$ /* ReplaySubject */})
• boilerplate for autoSpy feature

[gparlakov-vmware]

Also add a shortcut for until stop

  let untilStop$: Subject<void>;
  beforeEach(() => {
    untilStop$ = new Subject();
  });
  afterEach(() => {
    untilStop$.next();
    untilStop$.complete();
  });