Bump Newtonsoft.Json in /Plugins/org.secc.QRManager

Bumps [Newtonsoft.Json](https://github.com/JamesNK/Newtonsoft.Json) from 11.0.2 to 13.0.1.
- [Release notes](https://github.com/JamesNK/Newtonsoft.Json/releases)
- [Commits](JamesNK/Newtonsoft.Json@11.0.2...13.0.1)

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

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

Plugins/org.secc.QRManager/packages.config

@@ -3,7 +3,7 @@
   <package id="EntityFramework" version="6.2.0" targetFramework="net472" />
   <package id="Microsoft.AspNet.WebApi.Client" version="5.2.3" targetFramework="net452" />
   <package id="Microsoft.AspNet.WebApi.Core" version="5.2.3" targetFramework="net452" />
-  <package id="Newtonsoft.Json" version="11.0.2" targetFramework="net452" />
+  <package id="Newtonsoft.Json" version="13.0.1" targetFramework="net452" />
   <package id="Owin" version="1.0" targetFramework="net472" />
   <package id="QRCoder" version="1.4.1" targetFramework="net452" />
   <package id="System.IO" version="4.3.0" targetFramework="net452" />