Log Message:
misc/vym: Update to 2.9.31

Changelog:
da30b211 Version 2.9.31
2e01fce4 Bugfix: #128 - Crash when replacing a MapCenter with another map
81974822 Version 2.9.30
d5f7fc05 Bugfix: #126 Save user flags in XML export
a4347c29 Add io.github.insilmaril.vym.appdata.xml (#123)
b6182c6c Added Evgeniy Nochevnov for Russian translations
e01bff3f Update vym.ru.ts (#115)
8f4e86ca Version 2.9.28