Hi Natalie. Thanks for the information. You mention pull requests; does that mean you intend to put the source up on Github? That would certainly be helpful in the future.
(As for other plugins, Gutenberg does include the full source on Github, even though it is not packaged in the distribution. The GPL issue is simply that it needs to be possible for end-users to obtain the source code so they can make modifications.)
Anyway, thank you for the heads-up, and I will follow up on the source code request. Thanks!