function name out_degree in tutorial should be fixed to outdegree

[jipphysics]

In the tutorial says

# nodes size proportional to their degree
nodesize = [LightGraphs.out_degree(g, v) for v in LightGraphs.vertices(g)]
gplot(g, nodesize=nodesize)

which in my installation returns

UndefVarError: out_degree not defined
Stacktrace:
 [1] (::getfield(Main, Symbol("##19#20")))(::Int64) at ./none:0
 [2] iterate at ./generator.jl:47 [inlined]
 [3] collect(::Base.Generator{Base.OneTo{Int64},getfield(Main, Symbol("##19#20"))}) at ./array.jl:619
 [4] top-level scope at In[91]:1

Changing "out_degree" by "outdegree" fixed the issue for me.

[hdavid16]

This has been fixed. Issue should be closed.