Bump Newtonsoft.Json from 4.5.10 to 13.0.1 in /Tmx/Tmx.Client.Tests (#15

)

Bumps [Newtonsoft.Json](https://github.com/JamesNK/Newtonsoft.Json) from 4.5.10 to 13.0.1.
- [Release notes](https://github.com/JamesNK/Newtonsoft.Json/releases)
- [Commits](JamesNK/Newtonsoft.Json@4.5.10...13.0.1)

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

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Tmx/Tmx.Client.Tests/packages.config

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
   <package id="Common.Logging" version="2.0.0" targetFramework="net35" />
-  <package id="Newtonsoft.Json" version="4.5.10" targetFramework="net35" />
+  <package id="Newtonsoft.Json" version="13.0.1" targetFramework="net35" />
   <package id="Spring.Core" version="1.3.2" targetFramework="net35" />
   <package id="Spring.Http.Converters.NJson" version="1.1.1" targetFramework="net35" />
   <package id="Spring.Rest" version="1.1.1" targetFramework="net35" />