[#95] transformer: Set parent version

Signed-off-by: Dmitrii Stepanov <d.stepanov@yadro.com>

object/transformer/transformer.go

@@ -82,10 +82,12 @@ func (s *payloadSizeLimiter) initialize() {
 	if ln := len(s.previous); ln > 0 {
 		// initialize parent object once (after 1st object)
 		if ln == 1 {
+			ver := version.Current()
 			s.parent = fromObject(s.current)
 			s.parent.ResetRelations()
 			s.parent.SetSignature(nil)
 			s.parent.SetAttributes(s.parAttrs...)
+			s.parent.SetVersion(&ver)
 			s.parentHashers = append(s.parentHashers[:0], s.currentHashers...)
 		}