Custom sorting in Reactivesearch: possibly expose `sort` key on `ReactiveComponent`'s `setQuery`

**Affected Projects**
All

**Is your feature request related to a problem? Please describe.**

**Main problem to solve**: I would like to create a custom sorting component for the `ReactiveList`. There have been several issues that have been opened about this already such as: https://github.com/appbaseio/reactivesearch/issues/258 where @metagrover wrote about updating the `defaultQuery` of the result component.

I tried this but it seems like the inner `defaultQuery` does not update upon setting a new state.

**Describe the solution you'd like**
I think the most intuitive way to do this is to expose the `sort` key on `ReactiveComponent`'s `setQuery`. Right now, only changes to `query` are made so it isn't as flexible as it can be.

**Describe alternatives you've considered**
An alternative solution is to allow the `defaultQuery` to be updated when its function/props change.

I might have been doing this wrong so I've provided a codesandbox with both @metagrover 's proposed solution updating the `defaultQuery` of `ReactiveList` as well as showing how a potential `setQuery` with the sort key may look like.

https://codesandbox.io/s/tender-ritchie-15b32?file=/src/index.js

Please let me know if there's any other solution that might be better than these. Thanks!