Bump Newtonsoft.Json in /csharp/protractor_test/Sample_NUnit

Bumps [Newtonsoft.Json](https://github.com/JamesNK/Newtonsoft.Json) from 6.0.8 to 13.0.1.
- [Release notes](https://github.com/JamesNK/Newtonsoft.Json/releases)
- [Commits](JamesNK/Newtonsoft.Json@6.0.8...13.0.1)

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

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Author: dependabot[bot]

csharp/protractor_test/Sample_NUnit/packages.config

@@ -4,7 +4,7 @@
   <package id="Selenium.Support" version="2.44.0" targetFramework="net40" />
   <package id="Selenium.WebDriver" version="2.44.0" targetFramework="net40" />
   <package id="WebDriver.ChromeDriver.win32" version="2.12.0.0" targetFramework="net40" />
-  <package id="Newtonsoft.Json" version="6.0.8" targetFramework="net40" />
+  <package id="Newtonsoft.Json" version="13.0.1" targetFramework="net40" />
   <package id="NUnit" version="2.6.4" targetFramework="net40" />
   <package id="PhantomJS" version="2.0.0" targetFramework="net40" />
 </packages>