ristretto: update to 0.12.2

0.12.2 (2022-01-14)
======
- New Features:
  - Thumbnailer: Add support for shared thumbnail repositories (#82)
  - Thumbnailer: Add thumbnail flavor support (#81)

- Performance Improvement:
  - Optimization: Use TreeModel IFace to walk the image list
  - Optimization: Add index and list link to RsttoImageListIter
  - Optimization: Switch to GQueue in RsttoImageList

- Code Refactoring:
  - Flatpak: Add lifecycle manager patch to Xfconf dependency
  - Flatpak: Add Tumbler dependency as a private service (!35)
  - Flatpak: Add pixbuf loaders
  - Refactoring: Cleanup and simplifications around thumbnail size
  - Redistribute thumbnail sizes uniformly
  - Disable debug checks in release mode
  - Cleanup: Miscellaneous
  - Cleanup: Remove unused APIs in RsttoImageList

- Bug Fixes:
  - Fix and complete file change monitoring
  - Thumbnailer: Rework queue management
  - Thumbnailer: Properly set the number of visible items
  - Take the device scale into account to limit rendering quality
  - Avoid multi-threading issue with X11 (#76)

- Translation Updates:
  Albanian, Arabic, Armenian (Armenia), Basque, Belarusian, Bulgarian,
  Catalan, Chinese (China), Chinese (Taiwan), Croatian, Czech, Danish,
  Dutch, Eastern Armenian, English (Australia), English (United
  Kingdom), Estonian, Finnish, French, Galician, German, Greek, Hebrew,
  Hungarian, Icelandic, Indonesian, Interlingue, Italian, Japanese,
  Kazakh, Korean, Lithuanian, Malay, Norwegian Bokm鐃緒申l, Occitan (post
  1500), Polish, Portuguese, Portuguese (Brazil), Romanian, Russian,
  Serbian, Slovak, Slovenian, Spanish, Swedish, Thai, Turkish,
  Ukrainian, Uyghur

(gutteridge)