configureCssMinimizerPlugin(cssMinimizerPluginOptionsCallback = () => {}) {
        webpackConfig.configureCssMinimizerPlugin(cssMinimizerPluginOptionsCallback);

        return this;
    }
Allows you to configure the options passed to the css-minimizer-webpack-plugin.
A list of available options can be found at https://github.com/webpack-contrib/css-minimizer-webpack-plugin

For example:

```
Encore.configureCssMinimizerPlugin((options) => {
    options.parallel = false;
})
```

@param {OptionsCallback<import('css-minimizer-webpack-plugin').BasePluginOptions & import('css-minimizer-webpack-plugin').DefinedDefaultMinimizerAndOptions<import('css-minimizer-webpack-plugin').CssNanoOptionsExtended>>} cssMinimizerPluginOptionsCallback
@returns {Encore}