Stylelint 9.10.0 uses postcss-jsx to parse css-in-js solutions and postcss-html to parse vue/markdown/html files. These two together mean the embedded languages landscape is a lot cleaner than a few months ago in the days of 9.2.1.

However stylelint 9.9 to 9.10 changed how these embedded languages were passed into rules. In 9.9 the whole file content was available in root.source.input (i.e. a whole html or vue file, including all surrounding html tags tags). In 9.10 only the contents of style language fragments are available (i.e. only the content of each of the <style> tags gets passed to the rule).

This means that we can run stylelint with stylelint-prettier over these embedded language files, but it'll only prettify the style portions. If you're this interested in prettier then you probably want to run prettier over the rest of the file too to get it fully formatted. Thus it seems pointless to duplicate that work of running prettier within stylelint.

So stop running prettier over this handful of languages that can have style languages embedded into them.

This also adds a handful of e2e tests as which allow us to keep testing the embedded language end-to-end.

Fixes #18, #15 and #12.