YITH Event Tickets for WooCommerce Premium 1.35.0

* New: support for WordPress 6.1
* New: support for WooCommerce 7.1
* Update: YITH plugin framework

* New: support for WooCommerce 5.3
* Update: YITH Plugin Framework
* Fix: fixed purchasable button
* Fix: fixed purchasable button for non-event products
* Dev: improved ticket actions links and font (also phpcs)

New: support for WooCommerce 5.0
Update: plugin framework
Fix: fixed issues with fields label affecting to export CSV as well
Fix: added new check to avoid fatal error
Dev: added new yith_wcevti_background_size_pdf filter