Support GetPlayerItems and fix it's tests

Author: nicekiwi

examples/item/GetPlayerItems.txt

@@ -1,7 +1,7 @@
 Array
 (
     [numberOfBackpackSlots] => 50
-    [items] => NukaCode\Database\Collection Object
+    [items] => Illuminate\Support\Collection Object
         (
             [items:protected] => Array
                 (

src/Syntax/SteamApi/Steam/Item.php

@@ -40,7 +40,7 @@ public function GetPlayerItems($appId, $steamId)
         $items = $this->convertToObjects($client->result->items);
 
         // Return a full inventory
-        return (array) new Inventory($client->result->num_backpack_slots, $items);
+        return new Inventory($client->result->num_backpack_slots, $items);
     }
 
     protected function convertToObjects($items)

tests/BaseTester.php

@@ -18,7 +18,7 @@ class BaseTester extends TestCase {
 
     protected $packageId = 32848;
 
-    protected $itemid = 440;
+    protected $itemAppId = 440;
 
     protected $groupId   = 103582791429521412;
 

tests/ItemTest.php

@@ -6,13 +6,13 @@
 class ItemTest extends BaseTester
 {
     /** @test */
-    public function it_gets_items_for_an_by_user_id()
+    public function it_gets_items_for_an_app_by_user_id()
     {
-        $items = $this->steamClient->item()->GetPlayerItems($this->itemid, $this->id64);
+        $inventory = $this->steamClient->item()->GetPlayerItems($this->appId, $this->id64);
 
-        $this->assertCount(1, $items);
+        $this->assertCount(3, $inventory->items);
 
-        $item = $items->first();
+        $item = $inventory->items->first();
 
         $this->checkItemProperties($item);
     }