Gray border around png shapes

[egemon]

Hi guys, thanks u for such a great lib!
This is kinda duplicate of
itgalaxy/favicons#253
as far as this issue is still opened there from 1 Jan 2019 , is it possible to rollback dependency of this package and lock it no last working version?

[brunocodutra]

I think we can do better, Favicons might have already been fixed on the latest master, do you think you can verify that?