YITH WooCommerce Sequential Order Number Premium 1.34.0

• New Support to WooCommerce 3.5.0 RC2
• Update Plugin Framework
• Update Spanish language
• Update Italian language

* New: Support to WooCommerce 3.4.0
* New: Support to WordPress 4.9.6
* Update: Plugin Framework
* Update: Italian language

New: Support to WooCommerce 3.3.0
New: Support to WordPress 4.9.2
New: Dutch Language file
Update: Plugin Framework 3.0