Use componentDidUpdate instead of getDerivedStateFromProps

[theKashey]

Use componentDidUpdate instead of getDerivedStateFromProps to run side-effects?

Currently, one could use selector/flow-step with side-effect, and have to defer any state change he could execute inside, leading to 2 problems.

1. memoize-state does not properly work with async stuff, concreting usage just after a function call.
2. Possible double rendering.