YITH WooCommerce Affiliates Premium 3.5.0

* New: support for WordPress 5.7
* New: support for WooCommerce 5.1
* New: check over instance before processing payments
* Update YITH Plugin Framework
* Update: Italian language
* Tweak: get translated page of Terms and conditions with WPML
* Dev: added new yith_wcaf_set_ref_cookie filter
* Dev: added wpml config file to translate admin texts
* Dev: add a note to the payment when payment process doesn't belong to the correct instance

* New: support for WooCommerce 5.0
* New: German language
* Update: YITH Plugin Framework
* Update: Dutch language
* Fix: declared nonce to correctly save affiliate details
* Dev: added yith_wcaf_register_form action in registration form for logged users

* New: support for WordPress 5.5
* New: support for WooCommerce 4.4
* New: option to allow affiliates withdraw an amount of their choice
* New: breadcrumb for Affiliate Dashboard now contains link to get back to Dashboard home
* Update: plugin framework
* Tweak: reviewed withdraw shortcode appearance
* Tweak: added affiliate handling to REST api that creates order
* Tweak: affiliate now logs out directly from affiliate dashboard
* Fix: improved affiliate profile update, to avoid affiliate not having correct role
* Fix: prevent possible fatal when showing referrer form
* Fix: avoid auto commission also when there is a affiliate coupon applied in the order
* Dev: added yith_wcaf_max_rate_value filter
* Dev: added yith_wcaf_line_item_commission_total filter
* Dev: added yith_wcaf_line_total_check_amount_total filter
* Dev: added yith_wcaf_no_affiliate_message filter
* Dev: added yith_wcaf_user_details_affiliates_table filter