WooCommerce Mix and Match Products 2.6.1

* Fix: Fatal error with All Products for WooCommerce Subscriptions < 3.2.
* Tweak: Apply style rules by class only and not by list elements.
* Tweak: Add compatibility module for WoodMart theme.
* Tweak: Remove wrapping div from add to cart button.
* Tweak: Change success class to woocommerce-message.
* Dev: Add wc_mnm_grid_has_flex_layout filter.

* Update: Tested up to WooCommerce 6.5.0.
* Fix: Import/export of child variations.
* Dev: Add update warning notice for when 2.0 is released.

* Update: Tested up to WooCommerce 6.1.0.
* Note: This release is largely targeted towards improved compatibility with mini-extensions. If you are using any mini-extensions, please look to see if there's an update.
* Dev: Frontend refactor container config to be array of objects. container.api.get_container_config( 'v2' ) to fetch new array[]{ product_id: 99, product_qty: 3 } .
* Dev: Add parameter to wc_mnm_template_add_to_cart() to optionally call add to cart template for a specific product. Improved compatibility with mini-extensions, ie: Grouped MNM.
* Dev: Revamp frontend price/rounding formatting functions to accept custom args.
* Dev: Frontend calculate totals and subtotals from config instead of HTML inputs. This will allow for compat with custom layouts, ie: Select Layouts.
* Dev: Pass false to 'wc-mnm-reset-configuration' triggerHandler to disable update_container(). Also related to compat for custom layouts.