* Feature - Declare compatibility with the WooCommerce Cart and Checkout blocks.
* Tweak - Updated the plugin URLs to the new woo.com domain.
* Tweak - Updated plugin author.
* Tweak - Tested compatibility up to WC 8.5.
* Tweak - Tested compatibility up to WP 6.4.
* Fix - Fixed replacement of the 'interval' placeholder in the plain email texts.
* Fix - Fixed deprecation notice for providing a non-string value to the `DateTime` class constructor.
* Fix - Updated plugin templates.
* Fix - Changed the plugin namespace to `KoiLab\WC_Sales_Report_Email`.
* Dev - Dropped deprecated plugin code up to version 1.2.
* Dev - Updated the minimum requirements to WC 3.7, WP 4.9, and PHP 5.6.
