Update version 1.37.0 -> 1.38.0 (#1331)

Author: chrisdunelm

ClientGenerator/src/googleapis/codegen/languages/csharp/default/features.json

@@ -1,8 +1,8 @@
 {
   "language": "csharp",
   "description": "C# libraries for Google APIs.",
-  "releaseVersion": "1.37.0", "comment1": "Version of generated package.",
-  "currentSupportVersion": "1.37.0", "comment2": "Version of support library upon which to depend.",
+  "releaseVersion": "1.38.0", "comment1": "Version of generated package.",
+  "currentSupportVersion": "1.38.0", "comment2": "Version of support library upon which to depend.",
   "pclSupportVersion": "1.25.0", "comment3": "Version of PCL support library.",
   "net40SupportVersion": "1.10.0", "comment4": "Version of net40 support library.",
 

Src/Support/CommonProjectProperties.xml

@@ -2,7 +2,7 @@
 
   <!-- common nupkg information -->
   <PropertyGroup>
-    <Version>1.37.0</Version>
+    <Version>1.38.0</Version>
     <Authors>Google Inc.</Authors>
     <Copyright>Copyright 2017 Google Inc.</Copyright>
     <PackageTags>Google</PackageTags>