WooCommerce Lightspeed POS Integration 2.15.1

* New - Better notifications around failed inventory syncs, will now show up as an admin notice if a product does not sync correctly
* New - New "Sync on manual order cancellation" settings which allows for toggling inventory syncing on/off for order cancellations. Default is "on".
* Fix - Fixes issues around variation attributes getting reset
* Fix - Fixes "Lightspeed API Error - 422 'qoh' must be a positive integer" - plugin did not update inventory properly on orders that had quantities greater than the ones on hand
* Fix - Fixes 'jQuery not defined' error on the front-end
* Fix - Side-effect of the 'jQuery not defined' was orders not syncing on order success - this should now be resolved
* Fix - Categories are appended to existing ones instead of deleting the difference in categories
* Fix - Fixes "PHP Notice: Undefined variable: wclsi_matrix_id"
* Tweak - Better class and file organization

Fix – Bump version due to an issue with WooCommerce deployment

* Fix - Plugin will no longer set "stock status" if "Stock Quantity" is unchecked under "Selective Sync for WooCommerce Product"
* Fix - "Processing Order ..." on the "Order Thank You" page fixed so it does not show "undefined" values
* Fix - Syncing products from WooCommerce to Lightspeed improved, should result in less 429 errors, especially for Variable products
* Tweak - Optimizations around backgrounds jobs conflicting with other actions resulting in a reduction of errors