This update for translate-toolkit to 2.2.4 fixes several issues.

This security issue was fixed:

- Prevent inclusion of external ressources (XXE) (boo#1073535)

These non-security issues were fixed:

- Added support for nested and WebExtension JSON dialects.
- po2txt no longer converts non-translatable strings.
- Improvement for puncspace check.
- Support for .xliff extension.
- Added MinimalChecker and ReducedChecker checkers.
- Fixed resolving of country names translations.
- Refactored functions for resolving language/country names translation to be memory efficient.
- Improvements for ts and subtitles formats.
- Fixed Montenegrin language name.
- Avoid resolving external entities while parsing XML.
- Improvements for Android, ts and resx formats.
- Added support for PHP nested arrays.
- Added Kabyle language