ASP.NET Core OData 8.0.1

https://www.nuget.org/packages/Microsoft.AspNetCore.OData/8.0.1

1. Make methods as virtual in ODataSerializerProvider
2. Make methods as virtual in ODataDeserializerProvider

See details at: https://docs.microsoft.com/en-us/odata/changelog/aspnetcoreodata-8x#801