sort-prop-types fix to account for comments

I know comments on prop types are not in favour here, but for those who do have them, would it be acceptable to support sorting comments together with their prop types? i.e. currently the rule would fix
```js
{
  /** z */
  z: PropTypes.string,
  /** a */
  a: PropTypes.any
}
```
to
```js
propTypes: {
  /** z */
  a: PropTypes.any,
  /** a */
  z: PropTypes.string
}
```