[v3-alpha] the demo doesn't appear to run

[esistgut]

Looks like it is using the v3 features while keeping v2 dependencies in package.json.
Forcing the new versions results in the following error:
Unhandled Rejection (Error): Invariant failed: You should not use <Switch> outside a <Router> on src/App.js:45

  42 |         process.env.REACT_APP_DATA_PROVIDER
  43 |     );
  44 | 
> 45 |     this.setState({ dataProvider });
     | ^  46 | }
  47 | 
  48 | componentWillUnmount() {

[Kmaschta]

Locally, you have to rebuild everytime you change the react-admin code before running the demo.

Can you check it by running make install build run-demo on your host?

[fzaninotto]

The bug is real - I release 3.0.0-alpha.0 a bit too fast. #3440 should solve it.

[esistgut]

The demo is now running, thank you.

[fzaninotto]

Fixed by #3440