What's new in at-spi2-core 2.49.90:

* Fix a test failure/timeout.

* Add atspi_get_version() to return the runtime version of the library.

* Collection: fix match testing for attributes.

* Fix a NULL pointer dereference when deregistering an event listener that
  doesn't include a detail.

* Fix the documentation for interfaces in collection match rules.

* Add an AtspiLive enum to specify the politeness level for live regions,
  and document that this should be used for Announcement signals. Also add a
  notification signal in atk to replace the announcement signal that lacks
  the politeness information.


* Add an asynchronous version of atspi_generate_mouse_event.