Convert YAML keys and values back to strings
Convert YAML keys and values back to strings

I hadn't quite realized before that the user could also change the *keys* to
be non-strings too! This also prevents against that by just reinterpreting
everything as strings.

Freso/beets,MyTunesFreeMusic/privacy-policy,sampsyo/beets,SusannaMaria/beets,jcoady9/beets,pkess/beets,jcoady9/beets,LordSputnik/beets,kareemallen/beets,Freso/beets,jcoady9/beets,jackwilsdon/beets,pkess/beets,mried/beets,xsteadfastx/beets,diego-plan9/beets,MyTunesFreeMusic/privacy-policy,SusannaMaria/beets,kareemallen/beets,madmouser1/beets,shamangeorge/beets,shamangeorge/beets,parapente/beets,mried/beets,lengtche/beets,kelvinhammond/beets,artemutin/beets,mosesfistos1/beetbox,LordSputnik/beets,lengtche/beets,xsteadfastx/beets,LordSputnik/beets,swt30/beets,jcoady9/beets,LordSputnik/beets,artemutin/beets,ibmibmibm/beets,kareemallen/beets,lengtche/beets,swt30/beets,xsteadfastx/beets,parapente/beets,SusannaMaria/beets,swt30/beets,Freso/beets,kareemallen/beets,jackwilsdon/beets,beetbox/beets,jackwilsdon/beets,diego-plan9/beets,beetbox/beets,artemutin/beets,ibmibmibm/beets,kelvinhammond/beets,ibmibmibm/beets,Freso/beets,diego-plan9/beets,jackwilsdon/beets,Kraymer/beets,sampsyo/beets,ibmibmibm/beets,madmouser1/beets,SusannaMaria/beets,pkess/beets,MyTunesFreeMusic/privacy-policy,Kraymer/beets,mosesfistos1/beetbox,MyTunesFreeMusic/privacy-policy,mosesfistos1/beetbox,beetbox/beets,madmouser1/beets,pkess/beets,sampsyo/beets,shamangeorge/beets,mried/beets,mosesfistos1/beetbox,swt30/beets,xsteadfastx/beets,sampsyo/beets,beetbox/beets,mried/beets,Kraymer/beets,kelvinhammond/beets,parapente/beets,kelvinhammond/beets,shamangeorge/beets,artemutin/beets,Kraymer/beets,diego-plan9/beets,lengtche/beets,parapente/beets,madmouser1/beets