Thanks for pointing that out. I see it now and the full text has been since added to the repository. I was looking at the source and only saw copyright!

Copyright forms the basis of F/OSS licenses; if you don't own the copyright, you can't put it under a F/OSS license in the first place.

Good to see that there's now a License.md file. (I would have called it LICENSE instead, but eh, bikeshedding.)