Description

Hi,
as suggested in sveltejs/eslint-plugin-svelte#402, I'd like to add support for rules around styles to eslint-plugin-svelte. However, since I am going to be implementing style parsing to do that, I thought maybe it would be better to provide it as part of svelte-eslint-parser?

I am not sure if there's any way of making this compatible with ESTree, but I'm not sure that is actually necessary or even a good idea. I just think that having an AST for styles may make it easier to create eslint-plugin-svelte rules that work with styles.