Woocommerce Local Pickup Plus 2.11.5

* Tweak - Display a message when shipping might be available but hasn't been calculated yet and local pickup seems to be the only option

* Misc - Add support for WooCommerce 3.3

* Tweak - Improve front end performance, especially when many pickup locations exists and many items are in cart
* Tweak - Ensure that the amount of available working days for pickup match the corresponding amount of days specified in the deadline setting
* Tweak - Ensure that the lead time correctly offsets the first available day for pickup and that it also offsets the first available opening hours slot for pickup shown to the customer
* Fix - Improve accuracy of the pickup appointment calendar, where in some circumstances unexpected dates were made available or unavailable to the customers at checkout
* Fix - When using per-order location mode and automatic grouping is enabled, do not reload the cart or checkout pages upon toggling between package shipping or pickup
* Fix - Addresses one bug that might have hung checkout in some circumstances when using WordPress 4.9+ and WooCommerce 2.6.14 or older
* Fix - When removing all public holidays from the Local Pickup Plus pickup appointments settings and updating the settings, the public holidays would remain unchanged instead
* Fix - PHP error when order data is accessed via the REST API
* Fix - Address a possible race condition when selecting pickup date at checkout, causing the pickup date to disappear after selecting it
* Dev - The default pickup product availability when a product pickup preference is not yet set on new products or older products before installing Local Pickup Plus can be filterable