* New - support to WooCommerce 3.7
* New - support for YITH WooCommerce Waiting List also with 'Out of stock sync' enabled
* Update - plugin framework
* Update - language files
* Fix - added missing parameter in woocommerce_add_cart_item_data filter
* Fix - sync price of 'per item pricing' bundles for 'wc_product_meta_lookup' data
* Fix - sync stock status in frontend only
* Dev - added yith_wcpb_get_bundle_products_by_item function