Include threshold in `archive.best_elite` (#409) #2211

Job	Run time
coverage	1m 48s
pre-commit	1m 13s
pin	4m 2s
test (ubuntu-latest, 3.11)	1m 34s
benchmarks	1m 59s
test (macos-latest, 3.11)	4m 40s
docs	2m 23s
test (windows-latest, 3.11)	4m 9s
examples	3m 49s
tutorials_list	4s
tutorials (tutorials/arm_repertoire.ipynb)	1m 38s
tutorials (tutorials/cma_mae.ipynb)	2m 56s
tutorials (tutorials/features/example.ipynb)	40s
tutorials (tutorials/fooling_mnist.ipynb)	4m 10s
tutorials (tutorials/lsi_mnist.ipynb)	3m 0s
tutorials (tutorials/lunar_lander.ipynb)	2m 16s
tutorials (tutorials/tom_cruise_dqd.ipynb)	9m 9s
deploy	0s
	49m 30s

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