no keymap for back to Hiragana from Latin in Azik rule

[Funakoshi Kazuhiro]

Update from GH will solve this problem, because it is solved in 2014 there.
https://github.com/ueno/libskk/commit/e44927619cb43c7d48a0ad253f0e2b763e6bf9c5#diff-bac351c493304227a7ce9a4259d4f528

Otherwise every time users want to switch Latin -> Hiragana in Azik rule, they have to use mouse to change the input mode.

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: libskk0 1.0.2-3build1
ProcVersionSignature: Ubuntu 5.0.0-29.31~18.04.1-generic 5.0.21
Uname: Linux 5.0.0-29-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.9-0ubuntu7.7
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Tue Oct 1 11:37:13 2019
InstallationDate: Installed on 2019-08-28 (34 days ago)
InstallationMedia: Ubuntu 18.04.3 LTS "Bionic Beaver" - Release amd64 (20190805)
ProcEnviron:
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/usr/bin/zsh
SourcePackage: libskk
UpgradeStatus: No upgrade log present (probably fresh install)