Upgrade MS Test SDK

Author: jburnett

test/test.csproj

@@ -21,7 +21,7 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.NET.Test.SDK" Version="16.*" />
+    <PackageReference Include="Microsoft.NET.Test.SDK" Version="17.*" />
     <PackageReference Include="xunit.runner.visualstudio" Version="*" />
     <PackageReference Include="xunit" Version="*" />
     <PackageReference Include="FluentAssertions" Version="*" />