YITH WooCommerce Donations Premium 1.30.0

New: Support to WooCommerce 3.5.4
Updatelugin Framework
Update: Language file
Fix: Wrong total of orders with donations in the order table

• Update: Plugin Framework
• Update: Language File
• Fix : Extra field always visible in the donation form
• Tweak: TinyMCE button available on not Gutenberg pages

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