Add developing human brain atlas

[liezeltamon]

Hi all!

Thanks so much for this tool. Would it be possible to add this recent atlas from the Linnarsson lab, https://github.com/linnarsson-lab/developing-human-brain? I also plan to use this with SingleR :)

Thank you!

[LTLA]

Sorry for the late reply; I don't add datasets personally any more, but I'm happy to take a PR if you want to have a go at contributing to this package yourself.