Bump Microsoft.NET.Test.Sdk and Newtonsoft.Json (#116)

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

Updates `Microsoft.NET.Test.Sdk` from 17.12.0 to 17.13.0
- [Release notes](https://github.com/microsoft/vstest/releases)
- [Changelog](https://github.com/microsoft/vstest/blob/main/docs/releases.md)
- [Commits](microsoft/vstest@v17.12.0...v17.13.0)

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)

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

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

JsonFeedNet.Tests/JsonFeedNet.Tests.csproj

@@ -11,7 +11,7 @@
 
   <ItemGroup>
     <PackageReference Include="JustEat.HttpClientInterception" Version="5.1.0" />
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.12.0" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.13.0" />
     <PackageReference Include="Newtonsoft.Json" Version="13.0.3" />
     <PackageReference Include="xunit" Version="2.9.3" />
     <PackageReference Include="xunit.analyzers" Version="1.20.0" />