Change cairocffi imports for cairo about jupyter-shoebot

[rlafuente]

With this change there are no more ImportErrors, but when running other bits of code, this chokes on the bot.show() call:

---------------------------------------------------------------------------
NotImplementedError                       Traceback (most recent call last)
<ipython-input-3-957b8292ff5e> in <module>
      4 bot.fill(0.8)
      5 bot.rect(40, 50, 50, 30, .4)
----> 6 bot.show()

~/.virtualenvs/jupytershoebot/lib/python3.9/site-packages/shoebot-1.3.1-py3.9.egg/shoebot/grammar/bot.py in show(self, format, as_data)
    398 
    399             surface = cairo.ImageSurface(cairo.FORMAT_ARGB32, self.WIDTH, self.HEIGHT)
--> 400             self.snapshot(surface)
    401             surface.write_to_png(b)
    402             b.seek(0)

~/.virtualenvs/jupytershoebot/lib/python3.9/site-packages/shoebot-1.3.1-py3.9.egg/shoebot/grammar/bot.py in snapshot(self, target, defer, autonumber)
    363             # snapshot to Cairo surface
    364             if defer is None:
--> 365                 self._canvas.snapshot(target, defer)
    366                 defer = False
    367             ctx = cairo.Context(target)

~/.virtualenvs/jupytershoebot/lib/python3.9/site-packages/shoebot-1.3.1-py3.9.egg/shoebot/core/canvas.py in snapshot(self, target, defer, file_number)
    168             self._drawqueue.append(output_func)
    169         else:
--> 170             self._drawqueue.append_immediate(output_func)
    171 
    172     def flush(self, frame):

~/.virtualenvs/jupytershoebot/lib/python3.9/site-packages/shoebot-1.3.1-py3.9.egg/shoebot/core/drawqueue.py in append_immediate(self, render_func)
     47         this will run the whole queue up to this point
     48         """
---> 49         raise NotImplementedError("Not supported in DrawQueue")
     50 
     51     def append(self, render_func):

NotImplementedError: Not supported in DrawQueue

But this is a separate issue i suppose?

[stuaxo]

Yeah it probably needs it's own issue on shoebot.

It's blocked on this shoebot/shoebot#322