Use PsychroLib for psychrometric calculations about speedyweather.jl

[milankl]

Thanks for raising this. I believe there's also Thermodynamics.jl which probably has a similar focus? I don't know how much or how little overlap there is to over CliMA packages. In general, at the moment I think we can go relatively lightweight unless there's something harder to implement which we'd like to outsource to another (possibly existing) package.

[dmey]

I think Thermodynamics.jl is probably good enough actually if we ever need to! But yes for now, let's keep it light. Feel free to close this.

[milankl]

Perfect, if you feel anything should be taken via dependency on another package feel free to reopen this issue