ENH: only run coveralls on Py 3.5 to reduce spam
ENH: only run coveralls on Py 3.5 to reduce spam

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