4.21.1 - build: Rename POTFILES.in to POTFILES - I18n: Update po/LINGUAS list - build: Fix typo in optimization level - gepub-thumbnailer: Get pixbuf in "area-prepared" signal handler - gst-thumbnailer: Fix TumblerThumbnailFlavor leak - I18n: Update po/LINGUAS list - ffmpeg-thumbnailer: Update mime type list from upstream desktop file - xdg-cache: Fix TumblerThumbnailFlavor leaks - README.md: Add uninstall info - cover-thumbnailer: Capture regex matchinfo for series episodes - cover-thumbnailer: Update the base URL for TMDB - cover-thumbnailer: Use correct parameter types with curl - build: Remove old CHECK_VERSION preprocessor conditionals - Update README after switchover to meson - Remove autotools build - meson-build: Use configure_file() to generate GNU visibility files - gst-thumbnailer: Make mime type checking more flexible - Translation Updates: Arabic, Esperanto, Occitan (post 1500), Thai, Uyghur, Vietnamese