Unable to assign `false` to boolean properties

Code to reproduce:

```js
const vtk = await window.vtkReady;
const actor = vtk.vtkActor();
actor.visibility= false;
console.log(actor.visibility);
```

Error message:

```
Uncaught TypeError: 'set' on proxy: trap returned falsish for property 'visible'
    at <anonymous>:24:15
(anonymous) @ VM1304:24

```

@jourdain i will be taking care of this.