ESM: TypeError: Class extends value [object Module] is not a constructor or null error

```
class CheapWatch extends EventEmitter {
                         ^

TypeError: Class extends value [object Module] is not a constructor or null
```

This issue was addressed in the comments of https://github.com/Conduitry/cheap-watch/pull/4. I'm getting this when importing `cheap-watch` from a `"type": "module"` project.