Update CoolProp.jl
Update CoolProp.jl

Add call to Props1SI to PropsSI when only two string arguments.
DANA-Laboratory/CoolProp,DANA-Laboratory/CoolProp,dcprojects/CoolProp,henningjp/CoolProp,dcprojects/CoolProp,DANA-Laboratory/CoolProp,dcprojects/CoolProp,henningjp/CoolProp,henningjp/CoolProp,CoolProp/CoolProp,henningjp/CoolProp,JonWel/CoolProp,henningjp/CoolProp,JonWel/CoolProp,dcprojects/CoolProp,JonWel/CoolProp,henningjp/CoolProp,DANA-Laboratory/CoolProp,JonWel/CoolProp,DANA-Laboratory/CoolProp,CoolProp/CoolProp,DANA-Laboratory/CoolProp,CoolProp/CoolProp,dcprojects/CoolProp,CoolProp/CoolProp,henningjp/CoolProp,DANA-Laboratory/CoolProp,henningjp/CoolProp,CoolProp/CoolProp,CoolProp/CoolProp,dcprojects/CoolProp,CoolProp/CoolProp,CoolProp/CoolProp,JonWel/CoolProp,JonWel/CoolProp,dcprojects/CoolProp,JonWel/CoolProp