Prepare Azure.Core 1.20 release (Azure#24376)

Author: pakrym

sdk/core/Azure.Core.Experimental/CHANGELOG.md

@@ -1,14 +1,14 @@
 # Release History
 
-## 0.1.0-preview.17 (Unreleased)
-
-### Features Added
+## 0.1.0-preview.17 (2021-10-01)
 
 ### Breaking Changes
 
-### Bugs Fixed
-
-### Other Changes
+- The following types were removed:
+    - `DynamicContent`
+    - `DynamicRequest`
+    - `DynamicResponse`
+    - `ProtocolClientOptions`
 
 ## 0.1.0-preview.16 (2021-09-07)
 

sdk/core/Azure.Core.Experimental/src/Azure.Core.Experimental.csproj

@@ -1,4 +1,4 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <Description>Experimental types that might eventually move to Azure.Core</Description>
     <AssemblyTitle>Microsoft Azure Client Pipeline Experimental Extensions</AssemblyTitle>

sdk/core/Azure.Core/CHANGELOG.md

@@ -1,16 +1,16 @@
 # Release History
 
-## 1.20.0-beta.1 (Unreleased)
+## 1.20.0 (2021-10-01)
 
 ### Features Added
 
 - Added the static `DelegatedTokenCredential` type with a `Create` method, which returns an instance of `TokenCredential` that uses the supplied delgates to produce an `AccessToken`. This would most typically be used when an token has previously been obtained from some other source and that token needs to be returned by a `TokenCredential` instance.
-
-### Breaking Changes
+- Added `ResponseError` type to represent an Azure error type.
+- Added an experimental `ActivitySource` support.
 
 ### Bugs Fixed
 
-### Other Changes
+- Fixed an exception during EventSource creation on Xamarin.
 
 ## 1.19.0 (2021-09-07)
 

sdk/core/Azure.Core/src/Azure.Core.csproj

@@ -2,7 +2,7 @@
   <PropertyGroup>
     <Description>This is the implementation of the Azure Client Pipeline</Description>
     <AssemblyTitle>Microsoft Azure Client Pipeline</AssemblyTitle>
-    <Version>1.20.0-beta.1</Version>
+    <Version>1.20.0</Version>
     <!--The ApiCompatVersion is managed automatically and should not generally be modified manually.-->
     <ApiCompatVersion>1.19.0</ApiCompatVersion>
     <PackageTags>Microsoft Azure Client Pipeline</PackageTags>