What's new in at-spi2-core 2.1.90:
* Fixed a memory leak on DBus errors.
* Added org.a11y.Status.IsEnabled (currently a read-only property) to the bus
launcher.
* Fix for BGO#656004: atspi_accessible_get_relation_set returns a GArray again.
* Numerous documentation fixes from Aline Bessa.
* CLean up device listeners from disconnected applications.
* Fix for BGO#657585: Do not crash when the bus launcher is unable to open the
X display.