message: test(utils): Remove usage of testOnlyIfNodeVersionAtLeast(8)
  We do not support Node 6 anymore, so we don't need to guard against
  running on Node 6 in the tests.
diff: import * as isModule from '../src/is';
  import { normalize } from '../src/normalize';
  import * as stacktraceModule from '../src/stacktrace';
  -import { testOnlyIfNodeVersionAtLeast } from './testutils';
  describe('normalize()', () => {
  describe('acts as a pass-through for simple-cases', () => {
  @@ -48,7 +47,7 @@ describe('normalize()', () => {
  });
  });
  - testOnlyIfNodeVersionAtLeast(8)('extracts data from `Event` objects', () => {
  + describe('extracts data from `Event` objects', () => {
  const isElement = jest.spyOn(isModule, 'isElement').mockReturnValue(true);
  const getAttribute = () => undefined;
  