Refactored and renamed getAuthenticatingNamespaceObject(), added more type hints

CloudObjects/SDK/Common/CryptoHelper.php

@@ -60,7 +60,7 @@ class CryptoHelper {
         $this->objectRetriever = $objectRetriever;
         $this->namespace = isset($namespaceCoid)
             ? $objectRetriever->getObjectNode($namespaceCoid)
-            : $objectRetriever->getAuthenticatingNamespaceObject();
+            : $objectRetriever->getAuthenticatingNamespaceObjectNode();
         
         $this->reader = new NodeReader([
             'prefixes' => [