return preset normal for stats true

[snitin315]

What kind of change does this PR introduce?
closes #11072

Did you add tests for your changes?

Does this PR introduce a breaking change?

What needs to be documented once your changes are merged?

[webpack-bot]

For maintainers only:

• This needs to be documented (issue in webpack/webpack.js.org will be filed when merged)
• This needs to be backported to webpack 4 (issue will be created when merged)

[webpack-bot]

Thank you for your pull request! The most important CI builds succeeded, we’ll review the pull request soon.

[sokra]

Add a test. test/Defaults.test.js has some tests for normalization, add one there

[webpack-bot]

The minimum test ratio has been reached. Thanks!

[sokra]

Thanks