Fixed Build Issue

@luizmb corrected a build issue related to the SwiftRex dependencies in response to issue #3. I verified the changes today (04/06/2021) and things are working well again. Please use this release until a new one comes along !

Adding ViewProducer

We're now using CombineRextensions' ViewProducer to generate the views based on given source projections.

First viable version using SwiftRex

This first release highlights basic Redux concepts and leverages SwiftRex. It provides enough "core functionality" to be a descent Todo application.