Update 5.20.3.md

Author: totten

release-notes/5.20.3.md

@@ -24,14 +24,15 @@ Released December 28, 2019
 * **_CiviEvent_: Participant name is overwritten with billing name ([dev/event#25](https://lab.civicrm.org/dev/event/issues/25): [#16140](https://github.com/civicrm/civicrm-core/pull/16140))**
 * **_CiviMember_: Standard receipt has formatting issue ([dev/core#1490](https://lab.civicrm.org/dev/core/issues/1490): [#16121](https://github.com/civicrm/civicrm-core/pull/16121))**
 * **_CiviMember_: Membership importer ignores "join_date" ([dev/core#1485](https://lab.civicrm.org/dev/core/issues/1485): [#16120](https://github.com/civicrm/civicrm-core/pull/16120))**
+* **_Drupal_: Fail more gracefully when upgrading on PHP 5.x ([#591](https://github.com/civicrm/civicrm-drupal/pull/591) / [#583](https://github.com/civicrm/civicrm-drupal/pull/583); forward-port from 5.17)**
 
 ## <a name="credits"></a>Credits
 
 This release was developed by the following authors and reviewers:
 
 Wikimedia Foundation - Eileen McNaughton; MJW Consulting - Matthew Wire;
-Jamie Tillman; Coop SymbioTIC - Mathieu Lutfy; CiviDesk - Yashodha Chaku;
-Australian Greens - Seamus Lee; Agileware - Justin Freeman
+Jamie Tillman; Dave D; Coop SymbioTIC - Mathieu Lutfy; CiviDesk - Yashodha Chaku;
+CiviCRM - Tim Otten; Australian Greens - Seamus Lee; Agileware - Justin Freeman
 
 ## <a name="feedback"></a>Feedback