YITH WooCommerce Membership Premium 2.20.0

* New: support for WooCommerce 9.8
* Update: YITH plugin framework
* Update: language files
* Fix: remove capitalize rule in CSS files
* Dev: new filter 'yith_wcmbs_check_credits_in_membership_status'

New: support for WooCommerce 9.3
Update: YITH plugin framework
Fix: canceled membership after cancelling trial subscription
Fix: Argument #1 ($value) must be of type Countable|array, bool given
Dev: new parameter available for filter "yith_wcmbs_shortcode_membership_download_product_links_name"

* New: support for WooCommerce 8.6
* Update: YITH plugin framework