Bump Newtonsoft.Json from 12.0.3 to 13.0.1 in /XFInAppBilling

Bumps [Newtonsoft.Json](https://github.com/JamesNK/Newtonsoft.Json) from 12.0.3 to 13.0.1.
- [Release notes](https://github.com/JamesNK/Newtonsoft.Json/releases)
- [Commits](JamesNK/Newtonsoft.Json@12.0.3...13.0.1)

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

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

XFInAppBilling/XFInAppBilling.csproj

@@ -58,7 +58,7 @@
 	</ItemGroup>
 	<ItemGroup>
 		<Compile Include="**\*.shared.cs" />
-		<PackageReference Include="Newtonsoft.Json" Version="12.0.3" />
+		<PackageReference Include="Newtonsoft.Json" Version="13.0.1" />
 		<!--<None Include="..\..\nuget\readme.txt" PackagePath="readme.txt" Pack="true" />-->
 		<PackageReference Include="System.ValueTuple" Version="4.5.0" />
 	</ItemGroup>