YITH WooCommerce Role Based Prices Premium 1.34.0

* New: Support to WooCommerce 3.7 RC1
* Update: Plugin Framework
* Tweak: Integration with YITH WooCommerce Product Bundles Premium
* Tweak: Integration with YITH WooCommerce Dynamic Pricing and Discounts Premium

* New: Support to WordPress 5.2
* Update: Plugin Framework

* New: Support to WooCommerce 3.6.0 RC1
* New: Support to WordPress 5.1.1
* Fix: Price format with YITH WooCommerce Dynamic Pricing and Discounts Premium
* Fix: Price format with YITH WooCommerce Product Bundles Premium
* Update: Plugin Framework
* Update: Spanish language