Change ABC inference engine?

[marcjwilliams1]

Since, ApproxBayes.jl was integrated here there are a few more ABC engines available that are more fully-featured and likely better supported at present. I'm not using so much ABC in my research these days, so ApproxBayes.jl is unlikely to see much development moving forward.

Here are some alternatives:
https://github.com/JuliaApproxInference
https://github.com/tanhevg/GpABC.jl

[Vaibhavdixit02]

The JuliaApproxInference organization seems to be moving in a good direction to me but I am not familiar with the algorithms much so could you comment on the tradeoffs for these two options @marcjwilliams1 if possible?

[ChrisRackauckas]

https://github.com/SciML/DiffEqBayes.jl/blob/master/src/DiffEqBayes.jl#L16 we haven't had an abc engine in awhile. We should either update it or remove it from the docs.