Build error - ESM file cannot be loaded by `require`

Checking out the project and `pnpm i` and `pnpm run dev` throws the following error:

✘ [ERROR] "unocss/vite" resolved to an ESM file. ESM file cannot be loaded by `require`. See https://vitejs.dev/guide/troubleshooting.html#this-package-is-esm-only for more details. [plugin externalize-deps]

I was able to fix by adding 

`"type": "module",` to the playground package.json


