css string support

[dy]

Hi @mattdesl! I’ve noticed that sometimes it is useful to pass css string directly instead of css object:

css(el, `
font-size: 12px;
font-family: ${fontFamily};
...
`);

Because it alows for avoiding css-in-js notation, which is copy-paste compatible and in other ways handy.

Is there any sense to add css.set(element, string) clause?

[mattdesl]

Cool idea! I'll accept a patch. Probably won't merge until a couple weeks as I'm on vacation. 😁🍾

[dy]

@mattdesl here you go #12