Feature Request: scrollBy method

[brandonmcconnell]

@markcellus, thanks for creating such a versatile package to handle more complex and programmatic scrolling needs.

Would you consider adding a scrollBy method that accounts for the current scroll offset of the target, similar to how the browser's built-in APIs offer both scrollTo and scrollBy methods?

• scrollTo (MDN docs)
• scrollBy (MDN docs)

Thanks!