Update callback behavior in solvers to return false on user exit request#251

MohamedLaghdafHABIBOULLAH wants to merge 2 commits intoJuliaSmoothOptimizers:masterJuliaSmoothOptimizers/RegularizedOptimization.jl:masterfrom

MohamedLaghdafHABIBOULLAH:callback-return-booleanMohamedLaghdafHABIBOULLAH/RegularizedOptimization.jl:callback-return-booleanCopy head branch name to clipboard