Use dataclass.replace in SignatureReference construction. Fixes #231

Author: kislyuk

signxml/signer.py

@@ -319,7 +319,7 @@ def _get_c14n_inputs_from_references(self, doc_root, references: List[SignatureR
         for reference in references:
             uri = reference.URI if reference.URI.startswith("#") else "#" + reference.URI
             c14n_inputs.append(self.get_root(self._resolve_reference(doc_root, {"URI": uri})))
-            new_references.append(SignatureReference(URI=uri, c14n_method=reference.c14n_method))
+            new_references.append(replace(reference, URI=uri))
         return c14n_inputs, new_references
 
     def _unpack(self, data, references: List[SignatureReference]):