Fix – DB update for the previous version was broken

* method_exists for legacy WooCommerce versions

* Feature – Declare compatibility with the WooCommerce Cart and Checkout blocks.
* Tweak – Improved the provided info in the System Status Report.
* Tweak – Include the plugin version in the enqueued scripts and styles.
* Tweak – Sanitized input vars and escaped output content.
* Tweak – Updated the plugin URLs to the new woo.com domain.
* Tweak – Updated the plugin author.
* Tweak – Tested compatibility up to WC 8.6.
* Tweak – Tested compatibility up to WP 6.4.
* Dev – Updated plugin templates.
* Dev – Updated Dompdf library to version v2.0.4.
* Dev – Replaced the usage of the `json_encode()` function with `wp_json_encode()`.
* Dev – Added filter hook `wc_store_catalog_pdf_download_dompdf_options`.
* Dev – Deprecated action hook `woocommerce_store_catalog_pdf_download_dompdf_options`.
* Dev – Deprecated method `Plugin_Utils::get_active_plugins()`.
* Dev – Changed the plugin namespace to ‘KoiLab\WC_Store_Catalog_PDF_Download’.
* Dev – Drop deprecated plugin code up to version 2.1.

* Feature – Declare compatibility with the WooCommerce Cart and Checkout blocks.
* Tweak – Updated the plugin URLs to the new woo.com domain.
* Tweak – Updated the plugin author.
* Tweak – Tested compatibility up to WC 8.5.
* Tweak – Tested compatibility up to WP 6.4.
* Dev – Updated plugin templates.
* Dev – Dropped deprecated plugin code up to version 1.7.
* Dev – Changed the plugin namespace to `KoiLab\WC_Quick_View`.
* Dev – Updated the minimum requirements to WC 3.7, WP 4.9, and PHP 5.6.

* Fix: Coupon Usage Restriction field ‘Product quantity based restrictions’ is not getting updated when used in ‘Bulk generate’ & ‘Import-Export’
* Fix: Uncaught Error: Call to a member function get_cart() on null
* Update: POT, PO & MO file