upgrade react-scripts

[alyshae]

I had to update react-scripts to 3.4.0 in order to get this running. Just thought you might want to know. Thanks for the tutorial.

More details: react/create-react-app#8490

[felixrichnow]

Yes, I had the exact same issue. I'll write him a comment and tell him about it too @alyshae

[weibenfalk]

Thanks for you comments. Really strange that you had to update the scripts. I created this game on 3.3.0 and just tried it locally also and it works for me. =) But I'll update the scripts. Thanks for the notification.