setup: fix deps for older py2 versions
setup: fix deps for older py2 versions

fixes #338
olof/svtplay-dl,qnorsten/svtplay-dl,qnorsten/svtplay-dl,dalgr/svtplay-dl,dalgr/svtplay-dl,iwconfig/svtplay-dl,selepo/svtplay-dl,spaam/svtplay-dl,selepo/svtplay-dl,spaam/svtplay-dl,iwconfig/svtplay-dl,olof/svtplay-dl