Add code coverage to CI #691

Job	Run time
Detect Changes	6s
constantpredictor/iris	14s
constantpredictor/kc2	12s
constantpredictor/cholesterol	10s
randomforest/iris	9s
randomforest/kc2	10s
randomforest/cholesterol	14s
autogluon/iris	12s
autogluon/kc2	11s
autogluon/cholesterol	10s
autogluon/iris	13s
autogluon/kc2	11s
autogluon/cholesterol	10s
autosklearn/iris	12s
autosklearn/kc2	13s
autosklearn/cholesterol	13s
gama/iris	14s
gama/kc2	11s
gama/cholesterol	10s
h2oautoml/iris	12s
h2oautoml/kc2	10s
h2oautoml/cholesterol	14s
mlplanweka/iris	12s
mlplanweka/kc2	12s
mlplanweka/cholesterol	9s
mlr3automl/iris	10s
mlr3automl/kc2	10s
mlr3automl/cholesterol	10s
naiveautoml/iris	11s
naiveautoml/kc2	1s
naiveautoml/cholesterol	10s
tpot/iris	1s
tpot/kc2	1s
tpot/cholesterol	1s
tunedrandomforest/iris	1s
tunedrandomforest/kc2	1s
tunedrandomforest/cholesterol	1s
	5m 42s

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