Prepare for 1.14.0 release (#665)

Author: jmaeagle99

Directory.Build.props

@@ -21,7 +21,7 @@
   </PropertyGroup>
 
   <PropertyGroup>
-    <Version>1.13.0</Version>
+    <Version>1.14.0</Version>
     <!--
       .NET does not allow the above version format for AssemblyVersion, and this
       is the version used in gRPC headers. The format is
@@ -36,7 +36,7 @@
       and 0.2.0 then is 0.2.0.5. But if there is no prerelease version, just
       leave revision off.
     -->
-    <AssemblyVersion>1.13.0</AssemblyVersion>
+    <AssemblyVersion>1.14.0</AssemblyVersion>
   </PropertyGroup>
 
   <ItemGroup>