Tradebyte SDK 0.4.0

• Deprecation of method Tradebyte\Stock\Handler::updateStockFromStockList
• Deprecation of using Tradebyte\Stock\Model\Stock as parameter object-array with method Tradebyte\Stock\Handler::updateStock
• Added stock update support for several warehouses #13

$stockHandler->updateStock([
    (new Tradebyte\Stock\Model\StockUpdate())
        ->setArticleNumber('12345')
        ->setStock(6)
]);

or

$stockHandler->updateStock([
    (new Tradebyte\Stock\Model\StockUpdate())
        ->setArticleNumber('12345')
        ->addStockForWarehouse('zentrallager', 10)
        ->addStockForWarehouse('aussenlager', 5)
]);