AbstractState_set_fractions was not exported
AbstractState_set_fractions was not exported

Added the "AbstractState_set_fractions" function in the export list.
henningjp/CoolProp,henningjp/CoolProp,DANA-Laboratory/CoolProp,henningjp/CoolProp,henningjp/CoolProp,dcprojects/CoolProp,CoolProp/CoolProp,dcprojects/CoolProp,henningjp/CoolProp,CoolProp/CoolProp,CoolProp/CoolProp,CoolProp/CoolProp,JonWel/CoolProp,DANA-Laboratory/CoolProp,henningjp/CoolProp,JonWel/CoolProp,DANA-Laboratory/CoolProp,CoolProp/CoolProp,dcprojects/CoolProp,CoolProp/CoolProp,DANA-Laboratory/CoolProp,DANA-Laboratory/CoolProp,DANA-Laboratory/CoolProp,dcprojects/CoolProp,dcprojects/CoolProp,CoolProp/CoolProp,DANA-Laboratory/CoolProp,JonWel/CoolProp,dcprojects/CoolProp,JonWel/CoolProp,JonWel/CoolProp,henningjp/CoolProp,dcprojects/CoolProp,henningjp/CoolProp,JonWel/CoolProp,JonWel/CoolProp,CoolProp/CoolProp