Merge pull request #176 from aligent/fix/162-preorder-date-property

Fix/162 preorder date property

Author: jswift

src/BigCommerce/ResourceModels/Catalog/Product/Product.php

@@ -67,7 +67,7 @@ class Product extends ResourceModel
     public string $date_created;
     public string $date_modified;
     public int $view_count;
-    public ?object $preorder_release_date;
+    public ?string $preorder_release_date;
     public string $preorder_message;
     public bool $is_preorder_only;
     public bool $is_price_hidden;

tests/BigCommerce/responses/catalog__products__174__get.json

@@ -59,7 +59,7 @@
     "date_created": "2018-08-15T14:48:46+00:00",
     "date_modified": "2018-09-05T20:42:07+00:00",
     "view_count": 10,
-    "preorder_release_date": {},
+    "preorder_release_date": "",
     "preorder_message": "",
     "is_preorder_only": false,
     "is_price_hidden": false,

tests/BigCommerce/responses/catalog__products__get_all.json

@@ -60,7 +60,7 @@
       "date_created": "2018-08-15T14:48:46+00:00",
       "date_modified": "2018-09-05T20:42:07+00:00",
       "view_count": 10,
-      "preorder_release_date": {},
+      "preorder_release_date": null,
       "preorder_message": "",
       "is_preorder_only": false,
       "is_price_hidden": false,
@@ -168,7 +168,7 @@
       "date_created": "2018-08-15T14:48:36+00:00",
       "date_modified": "2018-08-20T15:11:17+00:00",
       "view_count": 21,
-      "preorder_release_date": {},
+      "preorder_release_date": "",
       "preorder_message": "",
       "is_preorder_only": false,
       "is_price_hidden": false,