YITH WooCommerce Product Slider Carousel Premium 1.34.0

* New: Support to WordPress 5.0
* New: Support to Gutenberg
* Update: Plugin Framework

* New: Support to WooCommerce 3.5.0 RC2
* Update: Plugin framework
* Update: Language file

* New: Option to enable mousewheel event
* New: Support to WooCommerce 3.5.0 RC1
* Update: Plugin framework
* Update: Language file
* Fix: W3C validator