Hey,
this is now a quiet old thread but in any case I still post an answer:
I don’t have the time to finish AnHeuermann/JuliaFMI and would recommend to try out fmi.jl. It is a very recent package that is still under development, but can indeed simulate 2.0 ModelExchange and Co-Simulation FMUs in Julia. But unlike my JuliaFMI is is actively developed and will improve even more.