Add serializedPath output

Author: jschaedl

serializer.rst

@@ -523,7 +523,7 @@ given class:
         |          |       "book:read",                                         |
         |          |   ]                                                        |
         |          |   "maxDepth" => null,                                      |
-        |          |   "serializedName" => null                                 |
+        |          |   "serializedPath" => [data][isbn]                         |
         |          |   "ignore" => false                                        |
         |          |   "normalizationContexts" => [],                           |
         |          |   "denormalizationContexts" => []                          |