Woocommerce Local Pickup Plus 2.11.5

* Fix - Ensure that the WooCommerce session and the chosen shipping methods are available when trying to set the pickup location as taxable address to avoid PHP errors in some circumstances

* Fix - Reload the checkout seamlessly when toggling between shipping and pickup in per-order checkout mode if applying the local pickup tax option is enabled to prevent persisting of the wrong taxable address in some circumstances
* Fix - If having a sole pickup location, per-order checkout mode and automatically grouping packages options are enabled, ensure the pickup location is persisting in the session for taxable address evaluation purposes
* Misc - Add support for WooCommerce 3.6
* Misc - Require PHP 5.4+

* Tweak - Add a WooCommerce System Status Report block gathering some Local Pickup Plus configuration data to aid troubleshooting
* Fix - When first opening a pickup appointment date picker, open the calendar to the first available date that is closest possible to the current date
* Fix - Clicking on the calendar icon should also open the pickup appointment date picker, not only when clicking on the date picker input field
* Fix - Make sure that any text strings attached to the shipping method, such as the ones displayed on the shipping method settings page, load their translations properly
* Fix - Improve the logic that determines which address to elect as the tax address when using the pickup location address as the tax address
* Misc - Update the SkyVerge Plugin Framework to version 5.3
* Misc - Drop support for PHP 5.2: PHP 5.3 is now the minimum supported version