What's new in at-spi2-core 2.53.1:

* tests: Clean up test application on SIGABRT/SIGSEGV.

* Set (allow-none) for nullable parameters to atspi_match_rule_new.

* collection: Allow specifying specific action names in match rules.

    atk-adaptor: Fix duplicated results in GetMatchesFrom.

* atk-adaptor: For collections, don't return objects with 0 actions as
  supporting AtkAction.

* Rename ATSPI_ROLE_PUSH_BUTTON to ATSPI_ROLE_BUTTON.