Bump Newtonsoft.Json from 12.0.2 to 13.0.2 in /Discord Media Loader

Bumps [Newtonsoft.Json](https://github.com/JamesNK/Newtonsoft.Json) from 12.0.2 to 13.0.2.
- [Release notes](https://github.com/JamesNK/Newtonsoft.Json/releases)
- [Commits](https://github.com/JamesNK/Newtonsoft.Json/compare/12.0.2...13.0.2)

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

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

Discord Media Loader/packages.config

@@ -4,7 +4,7 @@
   <package id="Microsoft.NETCore.Platforms" version="5.0.1" targetFramework="net461" />
   <package id="Microsoft.Win32.Primitives" version="4.3.0" targetFramework="net461" />
   <package id="NETStandard.Library" version="2.0.3" targetFramework="net461" />
-  <package id="Newtonsoft.Json" version="12.0.2" targetFramework="net461" />
+  <package id="Newtonsoft.Json" version="13.0.2" targetFramework="net461" />
   <package id="Nito.AsyncEx" version="5.1.2" targetFramework="net461" />
   <package id="Nito.AsyncEx.Context" version="5.1.2" targetFramework="net461" />
   <package id="Nito.AsyncEx.Coordination" version="5.1.2" targetFramework="net461" />