`animate()` is missing on Element

[estherkim]

Hi, using happy-dom with vitest and @testing-library/preact. When testing a component that calls Element.animate(), I get a TypeError: animate is not a function

https://github.com/capricorn86/happy-dom/blob/master/packages/happy-dom/src/nodes/element/Element.ts doesn't have animate() - could this be added please?