* Add - Support for Subscriptions with WooCommerce Payments.
* Fix - variable start date is using the correct value.
Fix - Mailer failing sometimes on PHP 8.
Add - Order Note Author free text field.
* Fix - Decode entities/ascii codes in email subjects.
* Fix - Introduce Newsletter block for Checkout block.
* Tweak - WC 6.2 compatibility.
* Fix - Change `changelog.txt` header format to match woorelease
* Fix - Fix/1073 opt ins emails with apostrophes not imported
* Fix - Replace is_ajax (deprecated in 6.1) with wp_doing_ajax
* Fix - Update Test config (#1071)
* Tweak - Add WooCommerce 6.0.0 to Travis test matrix (#1077)
* Tweak - Bump "WC tested up to" to version 6.0 (#1079)
Add - Filter for custom workflow timing options.
Fix - Prevent Order Created action from running too early
Fix - Escape html in email preheader.