Cesium is undefined - can we get ol-cesium to work with the current version of cesium?

[MichaelLangbein]

A fresh clone of this repository results in an error:

Uncaught TypeError: Cannot read property 'Scene' of undefined
    at new e (cesium.js:325738)
    at Object.<anonymous> (cesium.js:305272)
    at __webpack_require__ (cesium.js:55)
    at Object.<anonymous> (cesium.js:349102)
    at __webpack_require__ (cesium.js:55)
    at webpackJsonpCallback (cesium.js:26)
    at app.js:1

This is likely because cesium has moved to ES6 modules in version 1.63.

From package-lock.json:

"cesium": {
      "version": "1.63.0",
      "resolved": "https://registry.npmjs.org/cesium/-/cesium-1.63.0.tgz",
      "integrity": "sha512-hOTw9LQsKqrNRAaIzUDfA6vqZJv+AgOpxO+xWmTCApez0S+NpVE7h/5UqcIeNOYoT0qj4UThFCt1aWm0ioCBDw==",
      "dev": true,
      "requires": {
        "esm": "^3.2.25"
      }
    },

Indeed, building the repo with cesium version 1.47 works fine.

Is there any way to get ol-cesium to work with the current version of cesium?