Optional dependencies not failing on import

[MichalChromcak]

When using minimal pip install hcrystalball installation and trying to run following code with prophet, expected behavior is import error for prophet wrapper

import pandas as pd
from hcrystalball.model_selection import ModelSelector
from hcrystalball.utils import get_sales_data 

df = get_sales_data(n_dates=100,  
                                  n_assortments=2,  
                                  n_states=2,  
                                  n_stores=2)  

ms = ModelSelector(horizon=10,  
                                   frequency='D',  
                                   country_code_column='HolidayCode', 
                                   )

ms.create_gridsearch(sklearn_models=True, 
                                     prophet_models=True, 
                                     n_splits = 2, 
                                     between_split_lag=None, 
                                     sklearn_models_optimize_for_horizon=False, 
                                     autosarimax_models=False,                                    
                                     tbats_models=False, 
                                     exp_smooth_models=False, 
                                     average_ensembles=False, 
                                     stacking_ensembles=False,                     
                                     exog_cols=['Open','Promo','SchoolHoliday','Promo2'], 
                                     )

---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
<ipython-input-4-3c1b160302bf> in <module>
----> 1 ms.create_gridsearch(sklearn_models=True,
      2                     n_splits = 2,
      3                     between_split_lag=None,
      4                     sklearn_models_optimize_for_horizon=False,
      5                     autosarimax_models=False,

~/miniconda3/envs/hcb_conda/lib/python3.8/site-packages/hcrystalball/model_selection/_model_selector.py in create_gridsearch(self, n_splits, between_split_lag, scoring, country_code_column, country_code, sklearn_models, sklearn_models_optimize_for_horizon, autosarimax_models, autoarima_dict, prophet_models, tbats_models, exp_smooth_models, average_ensembles, stacking_ensembles, stacking_ensembles_train_horizon, stacking_ensembles_train_n_splits, clip_predictions_lower, clip_predictions_upper, exog_cols)
    234         """
    235         params = {k: v for k, v in locals().items() if k not in ["self"]}
--> 236         self.grid_search = get_gridsearch(frequency=self.frequency, horizon=self.horizon, **params)
    237 
    238     def add_model_to_gridsearch(self, model):

~/miniconda3/envs/hcb_conda/lib/python3.8/site-packages/hcrystalball/model_selection/_configuration.py in get_gridsearch(frequency, horizon, n_splits, between_split_lag, scoring, country_code_column, country_code, sklearn_models, sklearn_models_optimize_for_horizon, autosarimax_models, autoarima_dict, prophet_models, tbats_models, exp_smooth_models, average_ensembles, stacking_ensembles, stacking_ensembles_train_horizon, stacking_ensembles_train_n_splits, clip_predictions_lower, clip_predictions_upper, exog_cols)
    227             {
    228                 "model": [
--> 229                     ProphetWrapper(
    230                         clip_predictions_lower=clip_predictions_lower,
    231                         clip_predictions_upper=clip_predictions_upper,

TypeError: __init__() got an unexpected keyword argument 'clip_predictions_lower'