Highlights:

• Implement the COOLPROP_REFPROP_ROOT environment variable to make REFPROP integration easier
• Allow the configuration variables to be set via environment variables

Issues closed:

• https://github.com/CoolProp/CoolProp/issues/1829 : CoolProp can't load REFPROP v10 mixtures on Debian 9
• https://github.com/CoolProp/CoolProp/issues/1870 : n-pentane inconsistency properties
• https://github.com/CoolProp/CoolProp/issues/2400 : CoolProp not able to compute subcooled liquid MM properties
• https://github.com/CoolProp/CoolProp/issues/2445 : Incorrect Enthalpy Value Using CoolProp-REFPROP Wrapper
• https://github.com/CoolProp/CoolProp/issues/2447 : Incorrect Vapor Pressure Output for INCOMP::S800 (Syltherm 800)
• https://github.com/CoolProp/CoolProp/issues/2472 : Workflow Python cibuildwheel failing on upload to TestPyPi
• https://github.com/CoolProp/CoolProp/issues/2477 : How do I programme an isentropic compression to 140°C condensation temperature with Coolprop? (got a ValueError)
• https://github.com/CoolProp/CoolProp/issues/2485 : 11 fluids in Brines and Solutions have exclusive range check on fraction_max where an inclusive check would be an improvement.