added test for store_trace=true. Passes on my branch, fails with error on origin master.

Author: jonathanfischer97

lib/OptimizationEvolutionary/test/runtests.jl

@@ -42,4 +42,10 @@ Random.seed!(1234)
         return false
     end
     sol = solve(prob, CMAES(μ = 40, λ = 100), callback = cb, maxiters = 100)
+
+    #test that `store_trace=true` throws error. This should fail now that it is fixed
+    # @test_throws "type Array has no field value" solve(prob, CMAES(μ = 40, λ = 100), store_trace = true)
+    
+    #test that `store_trace=true` works now.
+    solve(prob, CMAES(μ = 40, λ = 100), store_trace = true)
 end