2018.06.06 - v3.4.4
* New: WooCommerce 3.4.2 compatibility
* Fix: PHP Notice: Undefined variable: smart_coupons_block
* Fix: Error: Call to member function 'get_id' on boolean when updating order
* Fix: Store Credit deducting everytime when order status is updated from order admin page
* Update: Enabled Free Shipping, Usage Limit (Per Coupon, Per User) field for Store Credit
* Update: Apply remaining balance of store credit to renewal order even if it is less than renewal order total [WooCommerce Subscription]
* Update: POT File
