Upgrade to webpack 5

[sonvan86]

Should we have any plan to upgrade this repository to webpack 5. It work well with React 18, so we can have lazy/Suspense... It's so cool!
Actually, I also try to upgrade to webpack 5, but I got so many error. And still got stuck while fix them

[vinodjoshi11]

new

[sonvan86]

Can you create PR to the manuelbieh repository?

[tomtom94]

Just use my setup and you are good to go :)

https://github.com/tomtom94/react-easy-ssr