Update code for Julia 0.7

[oliviaAB]

Hi,

I updated my version of Julia to Julia 0.7 and ran some simulations. I got some warnings about syntax changes in the newest version of Julia. Are you planning on updating the package to make it compatible with this newer version of Julia? If this can help, here is the list of changes required:

• Base.randexp is deprecated and has been moved to the standard library package Random. A using Random is required;
• Base.rowvals, Base.spzeros, Base.nonzeros and Base.nzrange are deprecated and have been moved to the standard library package SparseArrays. A using SparseArrays is required;
• The syntax Array{T}(m, n) is deprecated; Array{T}(undef, m, n) must be used instead;
• linspace(start, stop, length) is deprecated, range(start, stop = stop, length = length) must be used instead;
• copy!(dst, src) is deprecated, you can use either copyto!(dst, src) or Future.copy!(dst, src) instead;
• parse() is deprecated, Meta.parse() must be used instead.

Thank you!

[alanderos91]

Thanks, the changes for v0.7 are on their way and I'll tag a release once the tests all pass.

[oliviaAB]

Ok, thank you!