Probatus v3.0.0+ missing features & issues.

[ReinierKoops]

Issue Description
Probatus version 3.0.0+ removed some functionality that wasn't updated for multiple years, needed refactoring and was better done by other packages. When asking a sample of our users about this functionality, we noticed that as we suspected it wasn't used. Also with respect to maintainability, the fact it was out of sync with our other code and the potential to improve our core functionality in the future we chose to drop it.

If you make use of this package, but found that now some of its functionality that you previously used was removed in version 3.0.0, please report this here. Then we'll encourage you to use version 2.X.X in the meantime while we will look into reintroducing a modernized version of it. Also feel free to mention new ideas you might have.