Bump Newtonsoft.Json from 12.0.3 to 13.0.1 in test (#3353)

Author: dependabot[bot]

test/PSReadLine.Tests.csproj

@@ -19,7 +19,7 @@
     <PackageReference Include="System.Data.DataSetExtensions" version="4.5.0" />
     <PackageReference Include="System.Runtime.InteropServices.RuntimeInformation" version="4.3.0" />
     <PackageReference Include="Microsoft.CSharp" version="4.7.0" />
-    <PackageReference Include="Newtonsoft.Json" Version="12.0.3" />
+    <PackageReference Include="Newtonsoft.Json" Version="13.0.1" />
     <PackageReference Include="PowerShellStandard.Library" version="5.1.0" />
   </ItemGroup>