Bump Newtonsoft.Json from 11.0.2 to 13.0.1 in /RedisCaching.UnitTests

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]

Core.UnitTests/Core.UnitTests.csproj

@@ -14,7 +14,7 @@
     <PackageReference Include="Microsoft.Extensions.Configuration.Json" Version="2.1.0" />
     <PackageReference Include="MSTest.TestAdapter" Version="1.2.0" />
     <PackageReference Include="MSTest.TestFramework" Version="1.2.0" />
-    <PackageReference Include="Newtonsoft.Json" Version="11.0.2" />
+    <PackageReference Include="Newtonsoft.Json" Version="13.0.1" />
     <PackageReference Include="NLog" Version="4.5.10" />
     <PackageReference Include="PostSharp" Version="6.8.7" />
     <PackageReference Include="System.Runtime.Caching" Version="4.5.0" />

Core/Core.csproj

@@ -17,7 +17,7 @@
   </PropertyGroup>
   <ItemGroup>
     <PackageReference Include="Microsoft.Extensions.Configuration.Binder" Version="2.1.0" />
-    <PackageReference Include="Newtonsoft.Json" Version="11.0.2" />
+    <PackageReference Include="Newtonsoft.Json" Version="13.0.1" />
     <PackageReference Include="System.Collections.Immutable" Version="1.5.0" />
     <PackageReference Include="System.Configuration.ConfigurationManager" Version="4.5.0" />
   </ItemGroup>