Yew 0.18 support

[mistricky]

I can't use css-in-rust in Yew that version is 0.18

[MarcAntoine-Arnaud]

I have generate a PR #37
Waiting for approval ...
You can use the branch to start.

you can make it manually

use yew::html::Classes;
use css_in_rust::Style;

pub fn parser(style: Style) -> Classes {
    Classes::from(style.to_string())
}

to use

let style = match Style::create(...){...};
html!{
    <Element class=parser(style.clone()) ></Element>
}

[tea-lover-418]

There is a fork of this repo that added 0.18 support: https://github.com/futursolo/stylist-rs