py-cairocffi: Update to 0.9.0.

Version 0.9.0
.............

Released on 2018-08-06

* Drop Python 3.2 and 3.3 support
* Test with PyPy and PyPy3
* `#114 <https://github.com/Kozea/cairocffi/pull/114>`_:
  Fix test compatibility with Cairo 1.15.12
* `#112 <https://github.com/Kozea/cairocffi/pull/112>`_:
  Add cairo library name from PyGObject for Windows
* Fix ``pango_example.py``
* `#85 <https://github.com/Kozea/cairocffi/issues/85>`_:
  Fix crash with xbc tests
* Clean documentation
* Support Cairo features up to 1.15.12

(kleink)