This update for ristretto fixes the following issues:

Update to version 0.11.0

* Enable `HAVE_MAGIC_H`-delimited code
* Add option to copy image to clipboard (!20)
* Allow dragging window when CSD is used (#52)
* Remove GSourceFunc casts
* Added new stock icons with reverse DNS format
* Make sure that argument passed to strncmp is non-NULL (!1)
* privacy_dialog.c: Remove dead initialization (!2)
* image_list.c: Remove dead assignment (!2)
* Add basic GitLab pipeline
* Bug #16717: Move from exo-csource to xdt-csource
* Resolve couple "cast between incompatible function types" warnings
* Fix memory leaks in Privacy Dialog
* Resolve deprecation warnings
* Resolve some deprecation warnings
* Add inactivity timeout setting to Preferences
* Hide the cursor while inactive in fullscreen mode
* Fix 'Status bar appears upon leaving fullscreen'
* Do not show translation info on --help output
* Fix "window-state-event" handler
* Add support for old gtk2-style bg color settings
* Add missing LDFLAGS (fixes build on *bsd)
* In fullscreen mode, show toolbar when the mouse pointer
is moved to the top