Update version 1.70.0 -> 1.71.0

Bug fixes:

- #3027 - Fix audience claim for access token requests.

Features:

 - #3009 - Programmatic refresh credentials.

Author: amanda-tarafa

Src/Support/CommonProjectProperties.xml

@@ -2,7 +2,7 @@
 
   <!-- common nupkg information -->
   <PropertyGroup>
-    <Version>1.70.0</Version>
+    <Version>1.71.0</Version>
     <Authors>Google LLC</Authors>
     <Copyright>Copyright 2021 Google LLC</Copyright>
     <PackageTags>Google</PackageTags>

features.json

@@ -2,10 +2,10 @@
   "language": "csharp",
   "description": "C# libraries for Google APIs.",
   // Version of the generated packages
-  "releaseVersion": "1.70.0",
+  "releaseVersion": "1.71.0",
 
   // Version of the support libraries upon which to depend.
-  "currentSupportVersion": "1.70.0",
+  "currentSupportVersion": "1.71.0",
 
   // Defines the map of Google.Cloud packages that supercede Google.Apis packages
   "cloudPackageMap": {