I have only looked at QuantumBayesian.jl but there are still some issues pending.
[ ] gradient is deprecated and it has been removed in v1.0: 23816
[ ] Replace sub2ind and ind2sub with CartesianIndices and LinearIndices in the rest of the codebase. I replaced the libraries being imported and the functions being exported in QuantumBayesian.jl. See 24715 for more info on how this change in Julia v1.0 was implemented.
New mean, median, and std functions have mode from Base to Statistics: https://docs.julialang.org/en/stable/stdlib/Statistics/