Incorrect type definition provided for nodes argument in onSortEnd prop

According to the type definition, `nodes` of `onSortEnd` is an array of HTMLElement:

https://github.com/clauderic/react-sortable-hoc/blob/caf3c4f5bfb30894639391ae75c1bfc2b707a127/types/index.d.ts#L26-L32

But in reality, to access the HTMLElement, you need to use `nodes[0].node`, which triggers TypeScript error:

```javascript
{
console.log('nodes are', nodes); // {boundingClientRect: null, edgeOffset: null, node: HTMLElement, translate: null}[]

const node = nodes[0].node
console.log('the actual HTML element is', node);
}}
// ...
/>
```

So it looks like either the typedef is wrong, or the code is wrong.