message: docs: add missing type parameter to testing example
  Without this type parameter the call to `resolve()` is invalid.
  PR Close
diff: @@ -617,7 +617,7 @@ describe('demo (with TestBed):', () => {
  child.childValue = 'bar';
  - return new Promise(resolve => {
  + return new Promise<void>(resolve => {
  // Wait one JS engine turn!
  setTimeout(() => resolve(), 0);
  })
  