title: python matplotlib increase bar label font size
body: <p>I have a subplot which may include different stacked bar charts. I want to increase the font size of the bar label as it is appearing small.
  for ex. in</p>
  
  <pre><code>ax.bar(adjlocs, ...
   label='...', ...)
  </code></pre>
  
  <p>I want the font size of what is set to label to be larger. I did find ways to increase the text size of others in the plot except this one. How to achieve this? Thanks</p>