Fix: A customer could end up with two subscriptions if they have a failing one and then manually renew. The failing one is now cancelled when the new one is created.
Fix: JavaScript errors when updating a payment method for a Stripe subscription.
Fix: Old subscription not cancelled when upgrading via the Test Gateway.
Fix: Addresses for renewal payments could be empty if the customer record doesn't have an associated address, but the original payment did.
Fix: Fatal error when manually creating a subscription with an invalid payment ID.