Bring back string-quotes enforce to single

[quicoto]

In #12 we had to remove the deprecated rule "string-quotes": "single"

https://stylelint.io/user-guide/rules/string-quotes

Is there an equivalent we can integrate?

[kwin]

Should this be covered by prettier (stylelint/stylelint@716139d and stylelint/stylelint#6342)?

[quicoto]

Thanks @kwin It's a little sad that now we need another dependency just to manage if we want single or double quotes.

We need to do some more digging