Jihui Han

try [Makie.jl](https://github.com/JuliaPlots/Makie.jl)

The signature of the `modularity` function is ```julia function modularity{V,T

The `modularity` function only calculates the modularity of a given partition of the graph,and does not perform the optimization process. So this function is what you want. For example, you...

I find the function `optimize_partition` in line 15 of `/test/runtest.jl` should be `optimize_partition!`, and the change has been made. Please `Pkg.update()` and try again!

Thanks for your reminder. Any other problems please contact me.