document.styleSheets don't react to document.adoptedStyleSheets changes

[aralroca]

Describe the bug

const sheet = new CSSStyleSheet();

sheet.insertRule("div { color: red; }");
document.adoptedStyleSheets = [sheet];

Modifies the document.styleSheets, but in the tests with happy-dom, this is not reflected.

To Reproduce

Just run:

const sheet = new CSSStyleSheet();

sheet.insertRule("div { color: red; }");
document.adoptedStyleSheets = [sheet];

expect(document.styleSheets).not.toBeEmpty()

Expected behavior

The document.styleSheets should be updated according the the changes with document.adoptedStyleSheets.