Added TypeScriptToolsVersion=Latest to CoreMvc.csproj (#468)

Author: Josh Goldberg

src/React.Sample.CoreMvc/React.Sample.CoreMvc.csproj

@@ -8,6 +8,7 @@
     <PackageId>React.Sample.CoreMvc</PackageId>
     <NoWarn>1701</NoWarn>
     <RuntimeFrameworkVersion Condition=" '$(TargetFramework)' == 'netcoreapp2.0' ">2.0</RuntimeFrameworkVersion>
+    <TypeScriptToolsVersion>Latest</TypeScriptToolsVersion>
   </PropertyGroup>
 
   <ItemGroup>