ibus: update to 1.5.22.

pkgsrc changes:
- remove patches included in a new release
- require the latest unicode-character-database
- update BUILDLINK_API_DEPENDS per configure

Upstream changes:
https://github.com/ibus/ibus/releases/tag/1.5.22

1.5.22

* GDBusAuthObserver security fix
* Use XDG_CACHE_HOME for Unix socket directory
* Hangul button press handling
* Fix deprecated APIs
* Bug fixes

Code contributors

* Fix restart crash with inotify read() (Robert Hoffmann)
* Make session file header comment more clear (Jason)
* Amend typos (Jason)
* Add NotShowIn and Keywords keys to the desktop entry (Changwoo Ryu)
* Handle small final sigma in ibus_keyval_convert_case (Alex Henrie)

Translation contributors

* Update translation (Catalan) (Antoni Bella Perez)
* Update translation (French) (Julien Humbert)
* Update translation (French) (Jean-Baptiste Holcroft)
* Update translation (German) (Mike FABIAN)
* Update translation (Hebrew) (Yaron Shahrabani)
* Update translation (Hungarian) (Balazs Mesko)
* Update translation (Italian) (Luigi Toscano)
* Update translation (Korean) (Changwoo Ryu)
* Update translation (Persian) (Ahmad Haghighi)
* Update translation (Polish) (Piotr Drag)
* Update translation (Portuguese (Brazil)) (Rafael Fontenelle)
* Update translation (Turkish) (Oguz Ersen)
* Update translation (Ukrainian) (Yuri Chornoivan)

(tsutsui)