[Bug Report] Lazyload uses ‘data-sizes’ instead of ‘sizes’

Hi there,

First, I’d like to thank you for building this useful plugin.

Currently, there is an issue with lazyloading or image resizing.
If you enable lazyloading, images start to have the size attribute as a data attribute
data-sizes="(max-width: 661px) 100vw, 661px"

While it should be
sizes="(max-width: 661px) 100vw, 661px"

This causes a problem as small images are extremely scaled up especially on wider screens.

Have a good day!
Ahmed Elgameel