Unexpected keyword argument 'basex' when following the Getting Started base-2 log scale example

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* Python version: Python 3.10.1 (v3.10.1:2cd268a3a9, Dec 6 2021, 14:28:59)
* Numpy Version: 1.21.5
* matplotlib version 3.5.1:
* mpl-probscale version: 0.2.3
* Operating System: macOS Moterrey Version 12.2.1

### Description

Working through the [_Getting Started_](https://matplotlib.org/mpl-probscale/tutorial/getting_started.html#built-in-matplotlib-scales) section, on the second example with base-2 log scales, I get the following error:

```
TypeError: LogScale.__init__() got an unexpected keyword argument 'basex'
```

Changing `basex` to `base` resolves the issue.

### What I Did

```
import numpy
from matplotlib import pyplot as plt
from scipy import stats
import seaborn

clear_bkgd = {'axes.facecolor': 'none', 'figure.facecolor': 'none'}
seaborn.set(style='ticks', context='talk', color_codes=True, rc=clear_bkgd)

fig, (ax1, ax2) = plt.subplots(nrows=2, figsize=(8, 3))
ax1.set_xscale('log')
ax1.set_xlim(left=1e-3, right=1e3)
ax1.set_xlabel("Base 10")
ax1.set_yticks([])

ax2.set_xscale('log', basex=2)
ax2.set_xlim(left=2**-3, right=2**3)
ax2.set_xlabel("Base 2")
ax2.set_yticks([])

seaborn.despine(fig=fig, left=True)

plt.show()
```

Traceback:

```
>>> Traceback (most recent call last):
File "", line 1, in
File "/Users/ricardo/Documents/Sandbox/Python/probscale_examples.py", line 17, in
ax2.set_xscale('log', basex=2)
File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/site-packages/matplotlib/axes/_base.py", line 3777, in set_xscale
ax.xaxis._set_scale(value, **kwargs)
File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/site-packages/matplotlib/axis.py", line 761, in _set_scale
self._scale = mscale.scale_factory(value, self, **kwargs)
File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/site-packages/matplotlib/scale.py", line 597, in scale_factory
return scale_cls(axis, **kwargs)
TypeError: LogScale.__init__() got an unexpected keyword argument 'basex'
```

Ouvrez la section Getting Started de l’exemple intégré de mise à l’échelle de Matplotlib indiqué par le lien et comparez l’exemple en base 2 avec l’erreur Matplotlib signalée. Mettez à jour le mot-clé obsolète et vérifiez que l’exemple s’exécute sans l’exception de mot-clé inattendu.

Rédigé par le modèle d'indexation à partir du texte de l'issue.