MAINT: adding req for RTD
MAINT: adding req for RTD

mnicholl/MOSFiT,guillochon/MOSFiT,guillochon/FriendlyFit,guillochon/MOSFiT,mnicholl/MOSFiT,bmockler/MOSFiT,guillochon/MOSFiT,bmockler/MOSFiT,mnicholl/MOSFiT,villrv/MOSFiT,villrv/MOSFiT