Default export stopped working in Webpack

[Demivan]

In version v0.6.2 default exports stopped working in Webpack. Most likely in other tools too.
This does not work now:

// webpack.config.js
module.exports = {
  /* ... */
  plugins: [
    require('unplugin-vue2-script-setup/webpack')({ /* options */ }),
  ]
}

You need to write:

// webpack.config.js
module.exports = {
  /* ... */
  plugins: [
    require('unplugin-vue2-script-setup/webpack').default({ /* options */ }),
  ]
}

It is related to tsup update to version 5.0.0

tsup does not code-split cjs format now. And scripts/postbuild.ts performs an incorrect transformation as output files after build are different.