YITH WooCommerce Deals Premium 1.0.22

* Update: Plugin-Fw
* Dev: yith_wcdls_enqueue_script

* New: Support to WooCommerce 3.6.0 RC1
* Update: Plugin-Fw
* Update: Italian language
* Tweak: Enqueue scripts when they are necessary
* Dev: yith_wcdls_check_if_products_are_in_cart

* New: Admin option to accept the deal without user interaction
* Update: Plugin framework
* Update: Italian language
* Update: Dutch language