push! is type unstable

Hi,

I use SA in BifurcationKit but I recently noticed that the push! is type unstable. If I remove StructArray in here in ContResult, the TI disappear. Am I wrongly using your package?

using Revise
using BifurcationKit

function Fsl!(out, X, p)
    (;μ, c ) = p
    x, y = X
    ua = x^2 + y^2
    out[1] = μ * x - y - x * ua * c
    out[2] = x + μ * y - y * ua * c
    out
end

function JFsl!(J, X, p)
    (;μ, c) = p
    x, y = X
    ua = x^2 + y^2

    J[1, 1] = μ - c * (ua + 2x^2)
    J[1, 2] = -1 - 2c * x * y
    J[2, 1] = 1 - 2c * x * y
    J[2, 2] = μ - c * (ua + 2y^2)

    J
end
JFsl(x,p) = JFsl!(zeros(2,2),x,p)
prob = BifurcationProblem(Fsl!, zeros(2), (μ=0-.1, c=1.), (@optic _.μ); J! = JFsl!, J = JFsl)

opts = ContinuationPar(p_max = 2., detect_bifurcation = 0, detect_fold=false)
br = @time continuation(prob, PALC(), opts)

@profview (for _=1:10000; continuation(prob, PALC(), ContinuationPar(p_max = 2., detect_bifurcation = 0, detect_fold=false)); end 

gives

Start by reproducing the type-instability report with the Julia example and compare the StructArray and non-StructArray paths in BifurcationKit's src/Results.jl around line 81. Inspect the push! entry point and use the reported continuation workload to identify the instability; done means the affected path is type-stable without breaking the example.