dev tools dont show up in 6.1.1

upgrading from 6.0.3 to 6.1.1, the dev tools no longer show up in the top right corner.

my code to load them:

```js

const DevTools = React.lazy(() =>
			process.env.NODE_ENV === "production" ? 
Promise.resolve({default: () => null}) : (import("mobx-react-devtools") as any)
		);
<React.Suspense fallback={null}>
	<DevTools/>
</React.Suspense>
```