Bump newtonsoft.json from 12.0.1 to 13.0.2

Bumps [newtonsoft.json](https://github.com/JamesNK/Newtonsoft.Json) from 12.0.1 to 13.0.2.
- [Release notes](https://github.com/JamesNK/Newtonsoft.Json/releases)
- [Commits](JamesNK/Newtonsoft.Json@12.0.1...13.0.2)

---
updated-dependencies:
- dependency-name: newtonsoft.json
  dependency-type: direct:production
...

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

dotnet_pg_proxy.csproj

@@ -10,7 +10,7 @@
 </PropertyGroup>
 
 <ItemGroup>
-  <PackageReference Include="newtonsoft.json" Version="12.0.1" />
+  <PackageReference Include="newtonsoft.json" Version="13.0.2" />
   <PackageReference Include="npgsql" Version="4.0.5" />
 </ItemGroup>