WooCommerce Sales Report Email 1.3.1

* 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.

* Tweak - Tested compatibility up to WC 7.5.
* Fix - The date range interval didn't include the site timezone offset.

* Feature - Added compatibility with WooCommerce High-Performance Order Storage (HPOS).
* Tweak - Added links to the plugin settings, the documentation page, and to get support, in the plugin list.
* Tweak - Updated plugin author.
* Tweak - Tested compatibility up to WC 7.3.
* Tweak - Tested compatibility with WP 6.1.
* Dev - Implement the singleton pattern in the main plugin class.
* Dev - Updated the minimum requirements to WC 3.5, WP 4.7, and PHP 5.4