Convert to Hooks

[max-sym]

Changes:

• Converted the logic to hooks.

Packages:

• Added eslint + prettier (for code formatting);
• Updated react and react-dom;
• Removed stylus (was throwing an error in the current version) and redux;

The packages were changed because of personal preferences so it can be discussed, for sure :)

[tamagokun]

this is great! I'm glad you simplified the dependencies as it makes the example easier to understand. I think at the time I had just copied over some boilerplate App code that I was using.

I'm going to pull this down and give the code a look over. I think it's definitely worth merging this in and doing away with the old stuff :)

[max-sym]

Nice! I think that it's not 100% clean yet, but that's also just an example.

[wiktoriavh]

This seems to be older, but I do wanna say that this worked great when I was trying to build the nested list for react-dnd. This is my code: --> https://codesandbox.io/s/react-dnd-nested-list-example-fehzw