What would it take to bring this Julia 0.6 package to Julia 1.6?

General Usage
22

Looks good so far for me.
There is a long loop in constrsparsereg_admm.jl over k and after the loop in line 640 it is with my change:

       k=maxiters  #loop var k is out of scope here after the loop, so set it to the max

       βpath = βpath[:, 1:k-1]
       deleteat!(ρpath, k:length(ρpath))
       deleteat!(objvalpath, k:length(objvalpath))
       deleteat!(dfpath, k:length(dfpath))
       dfpath[dfpath .< 0] = 0;