at-spi2-core: updated to 2.44.1

What's new in at-spi2-core 2.44.1:

* Fix use after free when removing a hung process.

* Fix the build with X11 disabled.

* Fix crash when NULL is passed to some listener-related functions.

* impl_deregister_keystroke_listener: fix memory leak on iteration error.

What's new in at-spi2-core 2.44.0:

* Unlink the socket before binding when using dbus-broker. Fixes regression
  introduced in 2.43.92 where restarting the bus launcher would fail.

What's new in at-spi2-core 2.43.92:

* The AT-SPI bus now uses the user's XDG_RUNTIME_DIR for its socket.
Fixes accessibility for Snap-confined applications.

* Caps lock is now unlocked for key synthesis. Fixes cutting and
pasting from brltty when caps lock is on.

* Several fixes to the dbus specification.

* Fix the build when x11 is disabled.

* Fix several compiler warnings.

What's new in at-spi2-core 2.42.0:

* Set X root property when Xwayland starts on demand.

* Several dbus introspection fixes.

(adam)