Expose updateone to a service

mongox/mongox.go

@@ -28,6 +28,7 @@ type Database interface {
 	LoadOne(target interface{}, filters ...interface{}) (err error)
 	LoadStream(target interface{}, filters ...interface{}) (loader StreamLoader, err error)
 	SaveOne(source interface{}, filters ...interface{}) (err error)
+	UpdateOne(target interface{}, filters ...interface{}) (err error)
 	IndexEnsure(cfg interface{}, document interface{}) (err error)
 }