ValueError: Length mismatch with Tests

- While running the tests locally for branch `fix_requirements_jupyter`, I am getting the following error:
```
Traceback (most recent call last):
File "/.pyenv/versions/3.6.9/lib/python3.6/multiprocessing/process.py", line 258, in _bootstrap
self.run()
File "/.pyenv/versions/3.6.9/lib/python3.6/multiprocessing/process.py", line 93, in run
self._target(*self._args, **self._kwargs)
File "/categorical_encoding/venv/lib/python3.6/site-packages/category_encoders/hashing.py", line 189, in __require_data
data_part = self.hashing_trick(X_in=data_part, hashing_method=self.hash_method, N=self.n_components, cols=self.cols)
File "/categorical_encoding/venv/lib/python3.6/site-packages/category_encoders/hashing.py", line 377, in hashing_trick
X_cat.columns = new_cols
File "/categorical_encoding/venv/lib/python3.6/site-packages/pandas/core/generic.py", line 5287, in __setattr__
return object.__setattr__(self, name, value)
File "pandas/_libs/properties.pyx", line 67, in pandas._libs.properties.AxisProperty.__set__
File "/categorical_encoding/venv/lib/python3.6/site-packages/pandas/core/generic.py", line 661, in _set_axis
self._data.set_axis(axis, labels)
File "/categorical_encoding/venv/lib/python3.6/site-packages/pandas/core/internals/managers.py", line 178, in set_axis
f"Length mismatch: Expected axis has {old_len} elements, new "
ValueError: Length mismatch: Expected axis has 2 elements, new values have 8 elements
Traceback (most recent call last):
File "/.pyenv/versions/3.6.9/lib/python3.6/multiprocessing/process.py", line 258, in _bootstrap
self.run()
File "/.pyenv/versions/3.6.9/lib/python3.6/multiprocessing/process.py", line 93, in run
self._target(*self._args, **self._kwargs)
File "/categorical_encoding/venv/lib/python3.6/site-packages/category_encoders/hashing.py", line 189, in __require_data
data_part = self.hashing_trick(X_in=data_part, hashing_method=self.hash_method, N=self.n_components, cols=self.cols)
File "/categorical_encoding/venv/lib/python3.6/site-packages/category_encoders/hashing.py", line 377, in hashing_trick
X_cat.columns = new_cols
File "/categorical_encoding/venv/lib/python3.6/site-packages/pandas/core/generic.py", line 5287, in __setattr__
return object.__setattr__(self, name, value)
File "pandas/_libs/properties.pyx", line 67, in pandas._libs.properties.AxisProperty.__set__
File "/categorical_encoding/venv/lib/python3.6/site-packages/pandas/core/generic.py", line 661, in _set_axis
self._data.set_axis(axis, labels)
File "/categorical_encoding/venv/lib/python3.6/site-packages/pandas/core/internals/managers.py", line 178, in set_axis
f"Length mismatch: Expected axis has {old_len} elements, new "
ValueError: Length mismatch: Expected axis has 2 elements, new values have 8 elements
```