enableBuildNotifications(enabled = true, notifierPluginOptionsCallback = () => {}) {
        webpackConfig.enableBuildNotifications(enabled, notifierPluginOptionsCallback);

        return this;
    }
If enabled, display build notifications using
webpack-notifier.

https://github.com/Turbo87/webpack-notifier

```
Encore.enableBuildNotifications();

// or configure the webpack-notifier options
// https://github.com/Turbo87/webpack-notifier#configuration
Encore.enableBuildNotifications(true, function(options) {
    options.title = 'Webpack build';
});
```

@param {boolean} enabled
@param {OptionsCallback<object>} notifierPluginOptionsCallback
@returns {Encore}