YITH WooCommerce Uploads Premium 1.32.0

* New: Support for WooCommerce 4.2
* Update: plugin framework
* Update: .pot file
* Dev: added the class et_smooth_scroll_disabled to the upload link, to avoid problems with Divi

* New: Support for WordPress 5.4
* New: Support for WooCommerce 4.0
* Fix: fixed an issue with the variation rules selector
* Dev: all strings escaped
* Dev: deleted Emogrifier class load

* New: support WooCommerce 3.9
* Update: plugin framework
* Fix: option panel changes