xfce4-indicator-plugin: update to 2.4.0
Change log:
2.4.0
======
- Fix build with xfce4-panel 4.16
- Improved spacing, drop deprecated widget properties (Bug #14667)
- Drop dependency to exo-1
- Update README.md
- Add basic GitLab pipeline
- Switch to README.md and foreign automake mode
- replace outdated email address
- Update URLs from goodies.x.o to docs.x.o (Bug #16166)
- s/http/https
- Translation Updates:
Albanian, Belarusian, Catalan, Chinese (Taiwan), Czech, Danish,
Eastern Armenian, English (Australia), Finnish, French, Galician,
German, Greek, Hebrew, Hungarian, Icelandic, Interlingue, Italian,
Japanese, Lithuanian, Norwegian Bokmål, Polish, Portuguese,
Romanian, Russian, Slovak, Slovenian, Spanish, Turkish, Ukrainian
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