WooCommerce Subscriptions 6.3.1

Uploaded correct file (thanks @rafola )

* Fix: Store shipping line item instance ID separately and copy it to renewal line item meta. PR#3712
* Fix: Account for the base store tax rates subtracted from line items when paying for renewals manually. PR#3745
* Fix: Update the persistent cart while paying for renewal orders via the checkout. Fixes division by zero errors while manually renewing. PR#3824
* Fix: Clear report cache data before regenerating new preset date results preventing infinitely growing report caches. PR#3800
* Fix: Remove subscription period string transient caching to fix issues after translating. PR#3770
* Fix: WC 4.7 compatibility. Use filter to change endpoint titles in My Account. PR#3857
* Fix: When generating product price strings fallback to a default period string if no period is set. PR#3848
* Fix: Remove uses of jQuery( document ).ready() which was deprecated. PR#3846
* New: Add option to enable admin to lock in increased parent order line item prices. PR#3816
* Tweak: Allow admin to set a next payment date in 2 minutes via the edit subscription screen on staging sites. PR#3778

* Fix: Offset subscription next payment date calculations based on site time. All dates still remain in UTC, but calculations on the 1st and last day of the month will now take into account the site timezone. PR#3708
* Fix: Only attempt to display the customer notice when updating the default token from the My Account page. PR#3799
* Fix: Prefix variation attributes with `attribute_` when setting up renewal carts. PR#3809
* Dev: Add a new hook to the change_users_subscription() function - this hook is triggered before the status change. PR#3787