JS Release Notes update for December (#823)

releases/2019-12/2019-12-js.md

@@ -8,18 +8,24 @@ repository: azure/azure-sdk-for-js
 permalink: /releases/2019-12/js.html
 ---
 
-The Azure SDK team is pleased to make available the November 2019 client library preview release. This represents the fourth release of the ground-up rewrite of the client libraries to ensure consistency, idiomatic design, and excellent developer experience and productivity. This preview release includes new client libraries for Key Vault (keys and secrets), Event Hubs and Storage (blob, files and queues).
+The Azure SDK team is pleased to make available the December 2019 client library release. This represents the sixth release of the ground-up rewrite of the client libraries to ensure consistency, idiomatic design, and excellent developer experience and productivity. This release includes 
+- patch updates to existing libraries for Identity, Key Vault (keys and secrets) and Storage (blobs and queues)
+- new preview for Event Hubs and Keyvault Certificates
+- new library for Storage File Shares
 
 ## Installation Instructions
 To install the packages, copy and paste the below into a terminal.
 
-    $> npm install @azure/keyvault-keys@4.0.0
-    $> npm install @azure/keyvault-secrets@4.0.0
-    $> npm install @azure/keyvault-certificates@4.0.0-preview.9
-    $> npm install @azure/storage-blob@12.0.0
-    $> npm install @azure/storage-queue@12.0.0
-    $> npm install @azure/storage-file-share@12.0.0-preview.6
-    $> npm install @azure/event-hubs@@5.0.0-preview.5
+    $> npm install @azure/app-configuration@1.0.0-preview.9
+    $> npm install @azure/keyvault-keys
+    $> npm install @azure/keyvault-secrets
+    $> npm install @azure/keyvault-certificates@4.0.0-preview.11
+    $> npm install @azure/storage-blob
+    $> npm install @azure/storage-queue
+    $> npm install @azure/storage-file-share
+    $> npm install @azure/event-hubs@@5.0.0-preview.7
+    $> npm install @azure/eventhubs-checkpointstore-blob@1.0.0-preview.5
+    $> npm install @azure/identity
 
 ## Feedback
 If you have a bug or feature request for one of the libraries, please post an issue at the [azure-sdk-for-js repository](https://github.com/azure/azure-sdk-for-js/issues)
@@ -27,6 +33,26 @@ If you have a bug or feature request for one of the libraries, please post an is
 ## Changelog
 Detailed change logs are linked to in the Quick Links below. Here are some critical call outs.
 
+### App Configuration.
+
+The latest preview of the `@azure/app-configuration` package now supports credential objects from the `azure/identity` package.
+
+### Storage
+
+The `@azure/storage-file-share` package has moved from preview to stable stage.
+Please note that this package replaces the previous `@azure/storage-file` package.
+
+### Event Hubs
+
+The latest preview for the `@azure/event-hubs` package has built on top of the previous preview with slight API improvements
+across the board. 
+- To send events to a particular partition, the partition id is to be passed to the `createBatch` method instead of `sendBatch`.
+- The interfaces used by the checkpoint store have been updated to remove overlap between `PartitionOwnership` and `Checkpoint`.
+Therefore, if you have been using the `@azure/eventhubs-checkpointstore-blob` package to take advantage
+of the load balancing and checkpointing features, you will need to update it to the latest version as well.
+- Checkpoint store is now meant to be passed to the constructor of the `EventHubConsumerClient` class rather than the
+`subscribe()` method on it.
+
 ## Quick Links
 
 {% assign packages = site.data.releases.latest.js-packages %}