Why would you follow that link in particular? You can find all the license information here: https://wire.com/en/legal/terms-of-use-personal/ , scroll down and click on license information, there's like a 100 different licenses for the 100 different things they used in the software.
Because that is the link given in their main github repo. I'm not ready to trust someone with my privacy who can't even properly manage their weblinks.
gives Error 404, so we have no idea what license they are under and we are supposed to trust and use them.