Fix identity traits data type

Author: emyller

src/Engine/Engine.php

@@ -372,7 +372,7 @@ private static function _getContextValue($context, $property)
         }
 
         if ($context->identity !== null) {
-            return $context->identity->traits->{$property} ?? null;
+            return $context->identity->traits[$property] ?? null;
         }
 
         return null;

src/Engine/Utils/Types/Context/EvaluationContext.php

@@ -32,7 +32,7 @@ public static function fromJsonObject($jsonContext)
         $context->identity = new IdentityContext();
         $context->identity->key = $jsonContext->identity->key;
         $context->identity->identifier = $jsonContext->identity->identifier;
-        $context->identity->traits = $jsonContext->identity->traits;
+        $context->identity->traits = (array) ($jsonContext->identity->traits ?? []);
 
         $context->segments = [];
         foreach ($jsonContext->segments as $jsonSegment) {