message: fix(@nguniversal/common-engine): ReferenceError: URL is not defined
  Closes
diff: @@ -9,6 +9,7 @@ import { ResourceLoader } from '@angular/compiler';
  import { Compiler, CompilerFactory, NgModuleFactory, StaticProvider, Type } from '@angular/core';
  import { INITIAL_CONFIG, platformDynamicServer, renderModuleFactory } from '@angular/platform-server';
  import { dirname, resolve } from 'path';
  +import { URL } from 'url';
  import { FileLoader } from './file-loader';
  import { InlineCriticalCssProcessor } from './inline-css-processor';
  