WooCommerce Group Coupons 2.14.0

* Update - WordPress 6.8 compatible.
* Update - WooCommerce 10.0 compatible.
* Dev - Revised for PHPStan validation (rules via phpstan.neon).
* Dev - Revised several instances of empty checks on variables that are required to be objects.
* Dev - Fixed a wrong parameter documentation.
* Update - Made the coupon priority info shown easily distinguishable.

* Update - WordPress 6.8 compatible.
* Update - WooCommerce 9.9 compatible.

* Update - WordPress 6.7 compatible.
* Update - WooCommerce 9.7 compatible.
* Update - Revised styling.
* Update - Revised recommendations.
* Update - Updated the translation template.
* Update - Updated the German translation.
* Update - Updated the Spanish translation.

* Update - WordPress 6.6 compatible.
* Update - WooCommerce 9.4 compatible.

* Update - WordPress 6.6 compatible.
* Update - WooCommerce 9.2 compatible.
* Update - Requires at least WordPress 6.2.

* Update - WordPress 6.5 compatible.
* Update - WooCommerce 8.7 compatible.

* Update - WordPress 6.3 compatible.
* Update - WordPress 6.4-alpha compatible.
* Update - WooCommerce 8.1 compatible.
* Update - Requires at least WooCommerce 7.8.
* Update - Requires at least PHP 7.3

* Update - WordPress 6.2 compatible.
* Update - WooCommerce 7.8 compatible.
* Update - Requires at least WooCommerce 7.4.
* Update - Requires at least PHP 7.2.
* Update - WooCommerce HPOS compatible.

* WordPress 6.1 compatible.
* WooCommerce 7.4 compatible.

* Fixes a fatal error introduced in 1.28.0 produced when visiting the Coupons admin section while Groups is not active.