Add support for old Google "blobs" emoji set

[timabbott]

Zulip, which uses this data set, has gotten a lot of complaints from users about the migration from the old Google "blob" emoji set to Google's newer emoji set. A bit of research shows that a lot of other people feel the same way.

Based on that feedback, we ended up adding support for the blobs back to Zulip (see zulip/zulip#10158) by just using both old and new versions of this project. But we'd love for this to be supported in the upstream emoji-data project, and I suspect that a lot of other people would too.

So this is a feature request for making the googleblob emoji set data available again as part of this project.