4.19.1 - Update copyright year - gepub-thumbnailer: Return if GBytes buffer is NULL - build: Search for bind_textdomain_codeset in libintl too - Disambiguate thumbnailer signals - scheduler: Fix ready/error signal forwarding - desktop-thumbnailer: Use empty path to build cmdline if it is null - Update spec link in README - xdg-cache: Fix temporary file management when saving thumbnail - Add icon at 64px, clean up SVG metadata - I18n: Update po/LINGUAS list - I18n: Update po/LINGUAS list - Translation Updates: Catalan, Czech, Greek