add python version compatibility to readme
add python version compatibility to readme
simon-weber/gmusicapi,peetahzee/Unofficial-Google-Music-API,TheOpenDevProject/gmusicapi,tanhaiwang/gmusicapi,jimyx17/gmusic,simon-weber/Unofficial-Google-Music-API,nvbn/Unofficial-Google-Music-API,dvirtz/gmusicapi,thebigmunch/gmusicapi,dvirtz/gmusicapi