Defect: 5.3.6+ forces animation-name to be lowercase

[Knagis]

import { CSSStyleDeclaration } from "cssstyle";

const css = new CSSStyleDeclaration();

css.setProperty("animation-name", "fooBar");

console.log(css.getPropertyValue("animation-name"));
// outputs "foobar" on 5.3.6, "fooBar" on 5.3.5

CSS spec says animation-name is case sensitive: https://drafts.csswg.org/css-animations/#typedef-keyframes-name

[domenic]

Thanks for the report. The fix here will take a bit of time to be released since we have a lot of other improvements on the main branch, which will require a bit more coordination with jsdom. But it is coming.