Bump Newtonsoft.Json from 12.0.3 to 13.0.1 in /Morestachio.Tests (#24)

Bumps [Newtonsoft.Json](https://github.com/JamesNK/Newtonsoft.Json) from 12.0.3 to 13.0.1.
- [Release notes](https://github.com/JamesNK/Newtonsoft.Json/releases)
- [Commits](JamesNK/Newtonsoft.Json@12.0.3...13.0.1)

---
updated-dependencies:
- dependency-name: Newtonsoft.Json
  dependency-type: direct:production
...

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

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

Author: dependabot[bot]

Morestachio.Tests/Morestachio.Tests.csproj

@@ -8,7 +8,7 @@
     <ItemGroup>
         <PackageReference Include="JetBrains.DotMemoryUnit" Version="3.1.20200127.214830" />
         <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.2.0" />
-        <PackageReference Include="Newtonsoft.Json" Version="12.0.3" />
+        <PackageReference Include="Newtonsoft.Json" Version="13.0.1" />
         <PackageReference Include="NUnit" Version="3.13.3" />
         <PackageReference Include="NUnit3TestAdapter" Version="4.2.1" />
     </ItemGroup>