HERE Maps react webpack undefined global

Using the webpack portion of this tutorial generates error undefined global for production build.

Since TerserPlugin code from tutorial is not up to date (chunkFilter was removed in 3.0.0). I tried with multiple variations of

optimization: {
     minimizer: [new TerserPlugin({
         exclude: /mapsjs/
     })],
 }

but no luck.

From debugging it, I figured out that the here library is minified twice, because this webpack config made it work

optimiszation: {
     minify: false,
}

So the question becomes: how to build HERE maps with webpack 4 and 5?

P.S. In the end I asked for library when my component mounted:

const loadHERE = () => {
    return new Promise((resolve) => {
        const script = document.createElement('script');
        script.type = 'module';
        script.src = 'https://js.api.here.com/v3/3.1/mapsjs.bundle.js';
        script.async = true;
        script.onload = resolve;

        document.body.appendChild(script);
    });
};