v4.3.0: React Native new architecture support

This version introduces the support of React Native new architecture.
This was implemented in #410 by @okwasniewski
It was a huge amount of decent work, so I strongly encourage to check out the PR and give the Slider a go with new architecture in your app.
To do that, upgrade Slider package in your app and follow the official guide on how to migrate your app to new architecture.

This update does also introduce some improvements/changes "under the hood" so in case of any problems/errors please report them by creating new issue.