message: refactor(@nguniversal/builders): update jest-worker import to work with version 27
diff: @@ -18,7 +18,7 @@ import { augmentAppWithServiceWorker } from '@angular-devkit/build-angular/src/u
  import { normalize, resolve } from '@angular-devkit/core';
  import * as express from 'express';
  import * as http from 'http';
  -import JestWorker from 'jest-worker';
  +import { Worker as JestWorker } from 'jest-worker';
  import * as ora from 'ora';
  import { cpus } from 'os';
  import * as path from 'path';
  