* Fix - Update sanitization and output escaping across plugin files. * Tweak - WC 5.9 compatibility. * Tweak - WP 5.8 compatibility.
* Tweak - WC 5.0 compatibility. * Tweak - WP 5.6 compatibility.
* Fix - Remove call to deprecated `jQuery.trim` function. * Fix - link to product page and user docs. * Tweak - WC 4.8 compatibility. * Tweak - WP 5.6 compatibility.