webpack config for demonstrate border-width cssnano bug

webopack.config.js

const webpack = require('webpack');
const path = require('path');
const MiniCssExtractPlugin = require('mini-css-extract-plugin');
const CssMinimizerPlugin = require('css-minimizer-webpack-plugin');

module.exports = {
  entry: './src/index.js',
  output: {
    path: path.resolve(__dirname, 'dist'),
    filename: 'bundle.js'
  },
  plugins: [
    new MiniCssExtractPlugin(),
    require('cssnano')({
      preset: 'default',
    }),
  ],
  module: {
    rules: [
      {
        test: /\.css$/i,
        use: [
          MiniCssExtractPlugin.loader,
          'css-loader'
        ]
      },
    ],
  },
  optimization: {
    minimize: true,
    minimizer: [
      new CssMinimizerPlugin(),
    ],
  },
};