title: Title font in subplots with axes.title.set_text
body: <p>I have intention in making multiple subplot to present my results. I used subplots from matplotlib. I have a problem with text sizes. As you can see in the trivial code here. In the <code>plt.title</code> documentation it says <code>title(label, fontdict=None, loc='center', pad=None, **kwargs)</code></p>
  
  <pre><code>import random
  from matplotlib.pyplot import figure, plot, xlabel, ylabel, legend, close, subplots, title, savefig, get_current_fig_manager, show, pause, clf
  
  x = []
  for i in range(10):
      x.append(random.random()*i)
  
  y_1 = []
  
  for i in range(10):
      y_1.append(random.random()*i)
  y_2 = []
  
  for i in range(10):
      y_2.append(random.random()*i)
  
  
  fig, ax = subplots(1, 2, squeeze = False, figsize = (10,10))
  ax[0,1].title.set_text('y_1', fontdict = {'font.size':22})
  ax[0,1].plot(x,y_1)
  ax[0,1].set_xlabel('x')
  ax[0,1].set_ylabel('y_1')
  
  ax[0,0].title.set_text('y_2', fontdict = {'font.size':22})
  ax[0,0].plot(x,y_2)
  ax[0,0].set_xlabel('x')
  ax[0,0].set_ylabel('y_2')
  </code></pre>
  
  <p>but if I run this code I get an error <code>TypeError: set_text() got an unexpected keyword argument 'fontdict'</code></p>
  
  <p>am I using the wrong command. </p>