Re-add min-version for flake8 in setup.cfg
Re-add min-version for flake8 in setup.cfg

jackwilsdon/beets,ibmibmibm/beets,artemutin/beets,beetbox/beets,ibmibmibm/beets,lengtche/beets,beetbox/beets,madmouser1/beets,shamangeorge/beets,diego-plan9/beets,xsteadfastx/beets,Kraymer/beets,shamangeorge/beets,pkess/beets,Kraymer/beets,xsteadfastx/beets,madmouser1/beets,lengtche/beets,diego-plan9/beets,artemutin/beets,jackwilsdon/beets,jcoady9/beets,beetbox/beets,madmouser1/beets,sampsyo/beets,ibmibmibm/beets,jcoady9/beets,SusannaMaria/beets,MyTunesFreeMusic/privacy-policy,sampsyo/beets,SusannaMaria/beets,jcoady9/beets,mosesfistos1/beetbox,pkess/beets,xsteadfastx/beets,mosesfistos1/beetbox,Kraymer/beets,mosesfistos1/beetbox,pkess/beets,diego-plan9/beets,shamangeorge/beets,mosesfistos1/beetbox,lengtche/beets,lengtche/beets,MyTunesFreeMusic/privacy-policy,Kraymer/beets,jackwilsdon/beets,MyTunesFreeMusic/privacy-policy,pkess/beets,ibmibmibm/beets,artemutin/beets,sampsyo/beets,artemutin/beets,jackwilsdon/beets,shamangeorge/beets,diego-plan9/beets,madmouser1/beets,sampsyo/beets,jcoady9/beets,MyTunesFreeMusic/privacy-policy,beetbox/beets,SusannaMaria/beets,xsteadfastx/beets,SusannaMaria/beets