Resolve "external backup on S3"

Closes #26 (closed)

roles/ynh_backup/defaults/main.yml

@@ -34,4 +34,7 @@ ynh_borg_backup_remote_repo: False
 # Variables for YunoHost Restic
 # https://github.com/roles-ansible/ansible_role_restic
 ynh_restic_backup_scheduled: False
+do1jlr_restic_version:       "v0.7.1"
+restic_version:              "0.12.1"
 restic_schedule_type:        "cronjob"
+restic_keep_time:            "0y1m0d0h"