Add prepareViewForSkeleton to SkeletonCollectionViewDataSource

[pakerwreah]

Summary

Add prepareViewForSkeleton to SkeletonCollectionViewDataSource so we can reuse supplementary views as we do for normal cells using prepareCellForSkeleton .

Requirements (place an x in each of the [ ])

• [x] I've read and understood the Contributing guidelines and have done my best effort to follow them.
• [x] I've read and agree to the Code of Conduct.

[github-actions[bot]]

	Warnings
:warning:	Consider also updating the README for other languages.

Generated by :no_entry_sign: Danger Swift against 4422ccdcfaefec825375824181d795bd32c22def

[Juanpe]

Hi @pakerwreah :wave! Overall, it looks good to me.

Please, could you update the README file as well to indicate that this method is available?

Thanks!

[pakerwreah]

I did it. It's one of the files I've changed.

[Juanpe]

I did it. It's one of the files I've changed.

Oups! my fault 🤦🏼‍♂️

So, it's ready to merge 🚀

Thanks!