Update src/levenberg_marquardt.jl

Author: pkofod

src/levenberg_marquardt.jl

@@ -34,6 +34,7 @@ Comp & Applied Math).
 function levenberg_marquardt(df::OnceDifferentiable, initial_x::AbstractVector{T};
     x_tol::Real = 1e-8, g_tol::Real = 1e-12, maxIter::Integer = 1000,
     lambda = T(10), tau=T(Inf), lambda_increase::Real = 10.0, lambda_decrease::Real = 0.1,
+    min_step_quality::Real = 1e-3, good_step_quality::Real = 0.75,
     show_trace::Bool = false, lower::Vector{T} = Array{T}(undef, 0), upper::Vector{T} = Array{T}(undef, 0), avv!::Union{Function,Nothing,Avv} = nothing
     ) where T<:Real