Update py-at-spi2 to 2.36.0

What's new in pyatspi 2.35.1:

* Fix dead link in README.
* Adjust accepted test results for python 3.8 compatibility (!21).
* Add ROLE_MARK and ROLE_SUGGESTION (!22).

What's new in pyatspi 2.34.0:

* Updated doap, and include it in the tarball.

What's new in pyatspi 2.33.92:

* Several test fixes (thanks to Samuel THibault).
* Add license header on some test files.

What's new in pyatspi 2.33.90:

* Fix typo in get_imageLocale.
* event.str(): show event sender.
* Remove wrapper for atspi_text_notify_reading_position, as the function has
  been removed from at-spi2-core.
* events: replace object:text:reading-position with
  screen-reader:region-changed.
* Add wrapper for atspi_set_reference_window.

(prlw1)