No license

[Andrew-Chen-Wang]

For anyone looking to use this (obviously there are 596 stars and dozens of forks, so there are people who are), don't - you do not have permission. There is no open source license attached to this anywhere. All code is currently copyrighted under yinglun; you may not copy or use any of this code without the author's permission. @little2s Consider attaching an open source license such as Apache 2.0, BSD-3 Clause, or MIT license; write the license into a LICENSE file. It would relieve a lot of legal issues for most people here. You would also need to update the Swift package manager and other package manager meta data.

I'm not a lawyer; this is not legal advice. Just a personal recommendation.