Rename plugins to libs and update all file references

libs/stripe-php/lib/Issuing/CardDetails.php

@@ -0,0 +1,19 @@
+<?php
+
+namespace Stripe\Issuing;
+
+/**
+ * Class CardDetails.
+ *
+ * @property string $id
+ * @property string $object
+ * @property Card $card
+ * @property string $cvc
+ * @property int $exp_month
+ * @property int $exp_year
+ * @property string $number
+ */
+class CardDetails extends \Stripe\ApiResource
+{
+    const OBJECT_NAME = 'issuing.card_details';
+}