Bump Newtonsoft.Json from 8.0.3 to 13.0.1 in /src/dotnet-new3.VSIX

Bumps [Newtonsoft.Json](https://github.com/JamesNK/Newtonsoft.Json) from 8.0.3 to 13.0.1.
- [Release notes](https://github.com/JamesNK/Newtonsoft.Json/releases)
- [Commits](JamesNK/Newtonsoft.Json@8.0.3...13.0.1)

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

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

Author: dependabot[bot]

src/dotnet-new3.VSIX/packages.config

@@ -19,5 +19,5 @@
   <package id="Microsoft.VisualStudio.Utilities" version="14.2.25123" targetFramework="net452" />
   <package id="Microsoft.VisualStudio.Validation" version="14.1.111" targetFramework="net452" />
   <package id="Microsoft.VSSDK.BuildTools" version="14.2.25201" targetFramework="net452" developmentDependency="true" />
-  <package id="Newtonsoft.Json" version="8.0.3" targetFramework="net452" />
+  <package id="Newtonsoft.Json" version="13.0.1" targetFramework="net452" />
 </packages>