Bump Newtonsoft.Json and Microsoft.NET.Test.Sdk

Bumps [Newtonsoft.Json](https://github.com/JamesNK/Newtonsoft.Json) and [Microsoft.NET.Test.Sdk](https://github.com/microsoft/vstest). These dependencies needed to be updated together.

Updates `Newtonsoft.Json` from 13.0.3 to 13.0.1
- [Release notes](https://github.com/JamesNK/Newtonsoft.Json/releases)
- [Commits](JamesNK/Newtonsoft.Json@13.0.3...13.0.1)

Updates `Microsoft.NET.Test.Sdk` from 17.9.0 to 17.11.1
- [Release notes](https://github.com/microsoft/vstest/releases)
- [Changelog](https://github.com/microsoft/vstest/blob/main/docs/releases.md)
- [Commits](microsoft/vstest@v17.9.0...v17.11.1)

---
updated-dependencies:
- dependency-name: Newtonsoft.Json
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: Microsoft.NET.Test.Sdk
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

src/firely-net-sdk-tests.props

@@ -20,7 +20,7 @@
 	</PropertyGroup>
 
 	<ItemGroup>
-		<PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.9.0" />
+		<PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.11.1" />
 		<PackageReference Include="MSTest.TestFramework" Version="3.3.1" />
 		<PackageReference Include="MSTest.TestAdapter" Version="3.3.1" />
 		<PackageReference Include="xunit" Version="2.8.0" />