bayesian-optimization v2.0.0 version problem

[JanSchnabel]

Describe the bug
sQUlearn automatically installs "bayesian-optimization>=1.4.3", i.e. as of two days ago v2.0.0. This yields the following error

\site-packages\squlearn\optimizers\sglbo.py:3
      [1](.venv/lib/site-packages/squlearn/optimizers/sglbo.py:1) from collections import deque
      [2](.venv/lib/site-packages/squlearn/optimizers/sglbo.py:2) import numpy as np
----> [3](.venv/lib/site-packages/squlearn/optimizers/sglbo.py:3) from bayes_opt import BayesianOptimization, UtilityFunction
      [5](.venv/lib/site-packages/squlearn/optimizers/sglbo.py:5) from .approximated_gradients import FiniteDiffGradient
      [6](.venv/lib/site-packages/squlearn/optimizers/sglbo.py:6) from .optimizer_base import OptimizerBase, SGDMixin, default_callback, OptimizerResult

ImportError: cannot import name 'UtilityFunction' from 'bayes_opt'

To Reproduce

pip install bayesian-optimization --upgrade

from squlearn import Executor

Additional context
Requiring bayesian-optimization<2.0.0 should resolve this issue

[David-Kreplin]

Yes, we will reduce it in the next release.