Update appcast.xml for 0.9.54
Update appcast.xml for 0.9.54

CommandPost/CommandPost-App,knu/hammerspoon,Hammerspoon/hammerspoon,latenitefilms/hammerspoon,bradparks/hammerspoon,cmsj/hammerspoon,zzamboni/hammerspoon,zzamboni/hammerspoon,bradparks/hammerspoon,bradparks/hammerspoon,cmsj/hammerspoon,Hammerspoon/hammerspoon,zzamboni/hammerspoon,bradparks/hammerspoon,knu/hammerspoon,latenitefilms/hammerspoon,zzamboni/hammerspoon,knu/hammerspoon,CommandPost/CommandPost-App,asmagill/hammerspoon,Habbie/hammerspoon,Habbie/hammerspoon,Habbie/hammerspoon,zzamboni/hammerspoon,Habbie/hammerspoon,Habbie/hammerspoon,Hammerspoon/hammerspoon,knu/hammerspoon,cmsj/hammerspoon,asmagill/hammerspoon,CommandPost/CommandPost-App,latenitefilms/hammerspoon,Hammerspoon/hammerspoon,latenitefilms/hammerspoon,asmagill/hammerspoon,asmagill/hammerspoon,CommandPost/CommandPost-App,Habbie/hammerspoon,latenitefilms/hammerspoon,cmsj/hammerspoon,knu/hammerspoon,knu/hammerspoon,asmagill/hammerspoon,Hammerspoon/hammerspoon,zzamboni/hammerspoon,latenitefilms/hammerspoon,cmsj/hammerspoon,cmsj/hammerspoon,asmagill/hammerspoon,Hammerspoon/hammerspoon,CommandPost/CommandPost-App,CommandPost/CommandPost-App,bradparks/hammerspoon