Use vite to build library

[macklinu]

Hello, I was blocked from using this library in Remix (same issue as #76). I wasn't sure how to modify the existing build system to fix the issue, but switching to Vite could be a simpler way to build this library that isn't dependent on all of the create-react-app config. I ran the new build script (vite build) and linked it to a project of mine, and now the Avatar component renders as expected.

Are you open to this as a fix? I'd be happy to swap the demo over to Vite as well and get rid of a bunch of CRA & webpack dependencies to simplify - let me know and I'll open a couple issues.

Thanks!