W4306 warning

An embedded library has no license wowlua can find. Every embedded library's license goes into the AddOn's LICENSES.txt. wowlua looks for a LICENSE or COPYING file in the library's folder and its package's license; for a plain Lua library also a license header in its entry file or the files lua-library.license-files names. A wowlua library in a workspace (or in the folder of the package that uses it) without a license of its own has its root package's.

Check the library's license before you publish: you may not be allowed to pass on code without one. Add the license file to the library, or ask its author to. The warning comes from a dependency's files, so it has no example here.