* ensure we have no dependencies when `absoluteFilePath` is `null`
This happens in the CLI where we don't have a guaranteed `path` for the
config file. This can happen in practice if you use:
```console
npx tailwindcss --content ./index.html -o ./output.css
```
... and if you don't have a `tailwind.config.{js,ts,cjs,...}` in the
current directory.
* update changelog
8e85a865da