Error in Usage in readme

From your README:

```
import { JSONEditor, JSONEView } from 'ra-input-json';

// In List component use JSONEView component.
<JSONEView source="your source name" label="your label name" />

// In Form component such as SimpleForm use JSONEditor component.
<JSONEView source="your source name" label="your label name"/>
```

The second example should be JSONEditor