Add release-notes/5.20.1

release-notes.md

@@ -27,6 +27,15 @@ Released January 1, 2020
 - **[Credits](release-notes/5.21.0.md#credits)**
 - **[Feedback](release-notes/5.21.0.md#feedback)**
 
+## CiviCRM 5.20.1
+
+Released December 10, 2019
+
+- **[Synopsis](release-notes/5.20.1.md#synopsis)**
+- **[Bugs resolved](release-notes/5.20.1.md#bugs)**
+- **[Credits](release-notes/5.20.1.md#credits)**
+- **[Feedback](release-notes/5.20.1.md#feedback)**
+
 ## CiviCRM 5.20.0
 
 Released December 4, 2019

release-notes/5.20.1.md

+# CiviCRM 5.20.1
+
+Released December 10, 2019
+
+- **[Synopsis](#synopsis)**
+- **[Bugs resolved](#bugs)**
+- **[Credits](#credits)**
+- **[Feedback](#feedback)**
+
+## <a name="synopsis"></a>Synopsis
+
+| *Does this version...?*                                         |         |
+|:--------------------------------------------------------------- |:-------:|
+| Fix security vulnerabilities?                                   |   no    |
+| Change the database schema?                                     |   no    |
+| Alter the API?                                                  |   no    |
+| Require attention to configuration options?                     |   no    |
+| Fix problems installing or upgrading to a previous version?     | **yes** |
+| Introduce features?                                             |   no    |
+| **Fix bugs?**                                                   | **yes** |
+
+## <a name="bugs"></a>Bugs resolved
+
+* **_CiviMember_: Fix incorrect saving of relational memberships ([dev/membership#21](https://lab.civicrm.org/dev/membership/issues/21): [#16407](https://github.com/civicrm/civicrm-core/pull/16047))**
+* **_Upgrade_: Fix crash when `pre`/`post` hooks run during upgrade ([dev/core#1449](https://lab.civicrm.org/dev/core/issues/1449): [#16034](https://github.com/civicrm/civicrm-core/pull/16034))**
+
+## <a name="credits"></a>Credits
+
+This release was developed by the following authors and reviewers:
+
+Wikimedia Foundation - Eileen McNaughton; maynardsmith; marcineq; Fuzion -
+Peter Davis, Luke Stewart; Dave D; CiviDesk - Yashodha Chaku; Australian
+Greens - Seamus Lee
+
+## <a name="feedback"></a>Feedback
+
+These release notes are edited by Tim Otten and Andrew Hunt.  If you'd like to
+provide feedback on them, please login to https://chat.civicrm.org/civicrm and
+contact `@agh1`.