Bump Newtonsoft.Json from 12.0.3 to 13.0.2 in /server/PxStat

Bumps [Newtonsoft.Json](https://github.com/JamesNK/Newtonsoft.Json) from 12.0.3 to 13.0.2.
- [Release notes](https://github.com/JamesNK/Newtonsoft.Json/releases)
- [Commits](JamesNK/Newtonsoft.Json@12.0.3...13.0.2)

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

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Author: dependabot[bot]

server/PxStat/packages.config

@@ -23,7 +23,7 @@
   <package id="Microsoft.NETCore.Platforms" version="1.1.0" targetFramework="net472" />
   <package id="Microsoft.Win32.Primitives" version="4.3.0" targetFramework="net472" />
   <package id="NETStandard.Library" version="1.6.1" targetFramework="net472" />
-  <package id="Newtonsoft.Json" version="12.0.3" targetFramework="net472" />
+  <package id="Newtonsoft.Json" version="13.0.2" targetFramework="net472" />
   <package id="Pidgin" version="2.2.0" targetFramework="net472" />
   <package id="System.AppContext" version="4.3.0" targetFramework="net472" />
   <package id="System.Buffers" version="4.5.1" targetFramework="net472" />