Log Message:
Update to 2.12.0:

What's new in at-spi2-core 2.11.92:

* Fix a crash with MediaElch and Onboard (bgo#726243).

* Various i18n updates.

What's new in at-spi2-core 2.11.91:

* Improve compatibility with at-spi2-registryd <= 3.10.

What's new in at-spi2-core 2.11.90:

* bus-launcher: Do not use g_setenv when initializing the bus (bgo#724070).

* Fix a critical when processing deferred messages (bgo#724292).

* Add AtspitableCell, tracking the new atk interface

What's new in at-spi2-core 2.11.5:

* Add atspi_event_listener_register_full, and cache data requested by it
  for the duration of the event callback (BGO#708695).

* Fix a crash when atspi_accessible_get_process_id is called for an
  application that is no longer present.

What's new in at-spi2-core 2.11.3:

 * Fix atspi_text_get_bounded_ranges

* document: add support to current page and page count (BGO#719508).

What's new in at-spi2-core 2.11.2:

* Add new roles and states to track atk (BGO#710464, BGO#712608, BGO#712609).

What's new in at-spi2-core 2.11.1:

* Fix a gsource leak that adversely impacted performance (BGO#709625).

* Hopefully fix a rare crash when starting at-spi2-registryd (BGO#710689).

* Fix atspi_component_contains (BGO#710730).

* Fix some compiler warnings and build issues.