[App Config] changelog and update versions for GA (Azure#16115)

For 1.2.0 release

Author: HarshaNalluru

sdk/appconfiguration/app-configuration/CHANGELOG.md

@@ -1,13 +1,15 @@
 # Release History
 
-## 1.2.0-beta.3 (Unreleased)
+## 1.2.0 (2021-07-07)
 
 ### Features Added
-- With the dropping of support for Node.js versions that are no longer in LTS, the dependency on `@types/node` has been updated to version 12. Read our [support policy](https://github.com/Azure/azure-sdk-for-js/blob/main/SUPPORT.md) for more details.
 
-### Breaking Changes
+- Special configuration settings - feature flag and secret reference are now supported. 🎉
+
+  - For types, use `ConfigurationSetting<FeatureFlagValue>` and `ConfigurationSetting<SecretReferenceValue>`.
+  - Use `parseFeatureFlag` and `parseSecretReference` methods to parse the configuration settings into feature flag and secret reference respectively.
 
-### Key Bugs Fixed
+- With the dropping of support for Node.js versions that are no longer in LTS, the dependency on `@types/node` has been updated to version 12. Read our [support policy](https://github.com/Azure/azure-sdk-for-js/blob/main/SUPPORT.md) for more details.
 
 ### Fixed
 

sdk/appconfiguration/app-configuration/package.json

@@ -2,7 +2,7 @@
   "name": "@azure/app-configuration",
   "author": "Microsoft Corporation",
   "description": "An isomorphic client library for the Azure App Configuration service.",
-  "version": "1.2.0-beta.3",
+  "version": "1.2.0",
   "sdk-type": "client",
   "keywords": [
     "node",

sdk/appconfiguration/app-configuration/src/appConfigurationClient.ts

@@ -70,7 +70,7 @@ const packageName = "azsdk-js-app-configuration";
  * User - Agent header. There's a unit test that makes sure it always stays in sync.
  * @internal
  */
-export const packageVersion = "1.2.0-beta.3";
+export const packageVersion = "1.2.0";
 const apiVersion = "1.0";
 const ConnectionStringRegex = /Endpoint=(.*);Id=(.*);Secret=(.*)/;
 const deserializationContentTypes = {

sdk/appconfiguration/app-configuration/src/generated/src/appConfigurationContext.ts

@@ -10,7 +10,7 @@ import * as coreHttp from "@azure/core-http";
 import { ApiVersion10, AppConfigurationOptionalParams } from "./models";
 
 const packageName = "app-configuration";
-const packageVersion = "1.2.0-beta.3";
+const packageVersion = "1.2.0";
 
 /** @internal */
 export class AppConfigurationContext extends coreHttp.ServiceClient {