IBus 1.5.30 RC1 is released

[Takao Fujiwara]

IBus 1.5.30 RC1 is released.
https://github.com/ibus/ibus/releases/tag/1.5.30-rc1

A few features are implemented for Plasma Wayland but other plans are
postponed to the next released.

Enhance IBus with Plasma Wayland:
- Implement preedit color in Plasma Wayland 59944ddb
- Implement `ibus start/restart` for Plasma Wayland 74712fab e425bbf7
- Show preferences menu item in activate menu 3e7ee448

Data Updates & Bug Fixes:
- Fix control keys with game application 4872c1fc
- Fix typing freeze with barcode reader b49f3a47
- Fix memory issues 1be3e2f7 0a7a4d1d 43a6e38e
- Fix preedit issue with X applications 719792d3
- Code maintenance ac46d154 84708739 820fed38
- Update simple.xml, ibusunicodegen.h 1a17f88f 228f0a77
- Update CI 2ede4a1f a69a449b

Code Contributors:
- setup/enginedialog: Improve the search for engines (Mike FABIAN) d3d77627
- configure: Don't do AC_CHECK_FILE when cross compiling (oreo639) cc46e622

Translation Contributors:
- po: Update translation (Georgian) (Temuri Doghonadze) 16ebd40a
- po: Update translation (Chinese (Traditional) (zh_TW)) (Cheng-Chia
Tseng) 92769c37
- po: Update translation (Czech) (Krystof Cerny) 4620b333
- po: Update translation (Czech) (Daniel Rusek) e513e263
- po: Update translation (Hebrew) (Yaron Shahrabani) 68c1d6a0
- po: Update translation (Punjabi) (A S Alam) 82b56fd9
- po: Update translation (Turkish) (Oğuz Ersen) 8e310326
- po: Update translation (Chinese (Simplified) (zh_CN)) (Liu Tao) 847a80ec
- po: Update translation (Korean) (김인수) 11804709
- po: Update translation (Portuguese (Brazil)) (Rafael Fontenelle) dc27015c