Seaborn, change font size of the colorbar
<p>I wanted to change the font size for a heatmap colorbar.</p>

<p>The following is my code:</p>

<pre><code>import seaborn as sns
import matplotlib.pyplot as plt
from numpy import arange
x = arange(25).reshape(5, 5)
cmap = sns.diverging_palette(220, 20, sep=20, as_cmap=True)
ax = sns.heatmap(x, cmap=cmap)
plt.show()
</code></pre>

<p>I was able to change the tick labels with <code>plt.tick_params(axis='both', labelsize=20)</code>. However, the colorbar font size does not change. 
Is there a way to do that?</p>

<p><a href="https://i.stack.imgur.com/kHpvN.png" rel="noreferrer"><img src="https://i.stack.imgur.com/kHpvN.png" alt="enter image description here"></a></p>