Update syncthing to version 1.18.6 / rev 117 via SR 946390
    
    https://build.opensuse.org/request/show/946390
    by user mkittler + dimstar_suse
    - Update to 1.18.6
      * Enhancements:
        #8050: Display a warning when the ignore delete option is enabled
        #8068: Request: show pending devices/folders in CLI
    - remove instance units from post scripts, they can not be reloaded