Update required API version to 2019-12-03

CRM/Core/Payment/Stripe.php

@@ -16,7 +16,7 @@ class CRM_Core_Payment_Stripe extends CRM_Core_Payment {
    *
    * @var string
    */
-  const API_VERSION = '2019-11-05';
+  const API_VERSION = '2019-12-03';
 
   /**
    * Mode of operation: live or test.

docs/release/release_notes.md

 ## Release 6.3 (Not yet released)
-**This release REQUIRES that you upgrade mjwshared to 0.6 and your Stripe API version to 2019-11-05.**
+**This release REQUIRES that you upgrade mjwshared to 0.6 and your Stripe API version to 2019-12-03.**
 
-*If you wish to test the upgrade you can remain on 2019-09-09 but should update the API version as soon as you are happy.*
+*If you wish to test the upgrade you can remain on 2019-09-09 or later but should update the API version as soon as you are happy.*
 
-* **Update required Stripe API version to 2019-11-05**
+* **Update required Stripe API version to 2019-12-03**
 * Add support for recording partial refunds from Stripe.
 * For forms that have multiple submit buttons (eg. Save, Save and New) override the submit handler on all of them *(This fixes some more instances of missing PaymentIntentID on the backend forms).*
-* Resolve issues with backend forms and tax amounts *(fixes issues with backend forms that include an additional tax amount)*. 
+* Resolve issues with backend forms and tax amounts *(fixes issues with backend forms that include an additional tax amount)*.
 * Resolve issues with money formats that don't use a dot as decimal separator (eg. €1.024,20).
-* Update required Stripe API verison to 2019-11-05.
+* Update required Stripe API verison to 2019-12-03.
 * Fix issues with StripeSubscription.import and mismatched id/customer_id params.
 * Fix [#125](https://lab.civicrm.org/extensions/stripe/issues/125) Thousands of failed/spam transactions for charge.failed webhook *(We ignore and return 200 OK to Stripe so it does not retry if there is no customer ID)*.
 
@@ -87,7 +87,7 @@
 This release requires an upgrade to version 0.4 of the MJWShared extension.
 
  **ALL users of 6.0 should upgrade to this release.**
- 
+
  If upgrading to 6.x for the first time, please upgrade directly to 6.1 (do not install 6.0 first).
 
 #### Changes
@@ -214,7 +214,7 @@ Make sure you run the extension upgrades immediately after updating the code.  T
 
 ### Changes:
 * Use contact_id as reference in civicrm_stripe_customers and don't require an email address for payment.
-* Drop old webhook code / endpoint at https://{yoursitename.org}/civicrm/stripe/webhook. You **MUST** update your webhooks to use the standard CiviCRM endpoint at https://{yoursitename.org}/civicrm/payment/ipn/XX (see [Webhooks and Recurring Payments](/recur.md) for details). 
+* Drop old webhook code / endpoint at https://{yoursitename.org}/civicrm/stripe/webhook. You **MUST** update your webhooks to use the standard CiviCRM endpoint at https://{yoursitename.org}/civicrm/payment/ipn/XX (see [Webhooks and Recurring Payments](/recur.md) for details).
 
 
 ## Release 5.0