can't store iters, fitness, and best minimizer via callback

[jpp46]

I have been trying to store

1. the current number of iterations
2. the best fitness found so far
3. the genome of the individual with that value
   Through a callback function and have been trying to work with trace to get there right information into the callback.

When I don't override the trace function can call I get:
fieldnames(typeof(oc)) = (:iteration, :value, :metadata)
for the value of os

If I override the trace! function and set store_trace to true, no matter what I add to the dictionary I get
fieldnames(typeof(tr)) = ()
for the value of tr that I can see gets passed in in this case

I feel like this should be possible.

Maybe one solution would be to give the callback function an intermediate state of the results such that this would work:

function callback(intermediate_res)
items = Evolutionary.iterations(intermediate_res)
best_indv = Evolutionary.minimizer(intermediate_res)
best_fit = minimum(intermediate_res)
.
.

Code to save values

.
return false
end

[wildart]

Here is a docs page about traces: Look here: https://wildart.github.io/Evolutionary.jl/dev/tutorial/#Trace-1

This is an example of using it

Evolutionary.jl/test/onemax.jl

Lines 7 to 10 in 30d677f

	function Evolutionary.trace!(record::Dict{String,Any}, objfun, state, population, method::GA, options)
	idx = sortperm(state.fitpop)
	record["fitpop"] = state.fitpop[idx[1:5]]
	end