Backward compatibility for WooCommerce 6.1, 6.2 and 6.3

[ibndawood]

🔎 Isolate the bug

• I have confirmed this occurs in the most recent version of WordPress, WooCommerce, and Facebook for WooCommerce.
• I have confirmed this occurs when only WooCommerce and Facebook for WooCommerce are active and when using a default WordPress or WooCommerce theme.

✍️ Describe the bug

The WooCommerce minimum compatibility for the plugin is 5.3. The latest release v2.6.29 adds a class Setup which inherits the Automattic\WooCommerce\Admin\Features\OnboardingTasks\Task class. The class has an abstract method get_parent_id in WooCommerce versions: 6.1, 6.2, and 6.3. This method is not implemented in the Setup class and hence it would throw a critical error when running on WooCommerce 6.1, 6.2, or 6.3.

The method get_parent_id is a public method from WooCommerce 6.4 onwards. So this issue is specific to WooCommerce the above-mentioned 3 versions.

🚶‍♀️ Steps to reproduce

1. Install and activate WooCommerce 6.2
2. Install and activate Facebook for WooCommerce 2.6.29.
3. A critical error is thrown.

✔️ Expected behavior

No critical error should be thrown on activation.

🗃 Logs

An error of type E_ERROR was caused in line 0 of the file /mnt/data/home/XXXXXX.cloudwaysapps.com/XXXXXXXX/public_html/wp-content/plugins/facebook-for-woocommerce/includes/Admin/Tasks/Setup.php. Error message: Class SkyVerge\WooCommerce\Facebook\Admin\Tasks\Setup contains 1 abstract method and must therefore be declared abstract or implement the remaining methods (Automattic\WooCommerce\Admin\Features\OnboardingTasks\Task::get_parent_id)