Remove the use of UNSAFE_componentWillReceiveProps

[yoedfried]

Use memoize instead of saving the style in the state like explained in this doc: https://reactjs.org/blog/2018/06/07/you-probably-dont-need-derived-state.html#what-about-memoization

[IntelliJAbhishek]

Need a refoctor in StyleProvider.js replace componentDidUpdate

static getDerivedStateFromProps(nextProps) {
    if (nextProps.style !== this.props.style) {
       return {
            theme: new Theme(nextProps.style)
       };
    }else{
        return null;
    }
}

[IntelliJAbhishek]

@yoedfried can you commit with changes?

[yoedfried]

getDerivedStateFromProps is a static method so you cant reach this.props.style.
The only option to do it is to save the style into the state each time.
In StyleProvider the componentDidUpdate should be fine because we compare the props.style, and set the state only in case it changed.
Anyway, i can use the memoize also in this function (instead of componentDidUpdate).

[IntelliJAbhishek]

Ohh my mistake. How does memoize works?

[yoedfried]

memoize save the result of the function and return it back in case it called with the same vars.
I wasn't able to use it in StyleProvider (it cause me a problem).
Anyway, I think it is safe to use componentDidUpdate in there because of the if before the setState.
I wast able to change the theme in runtime with the change and without it, is it even supported by native base?