cannot import name 'UtilityFunction' from 'bayes_opt'

[Jooyuza]

bayes_opt published a new release, inlcuding API new redesign:

Deletes the UtilityFunction class and replaces it with a generic AcquisitionFunction base class

https://github.com/bayesian-optimization/BayesianOptimization/releases/tag/v2.0.0
bayesian-optimization/BayesianOptimization#447