Replace System.Data.SqlClient with Microsoft.Data.SqlClient

[SergeyBarskiyTyler]

Is your feature request related to a problem? Please describe.
Microsoft has announced that future development of their .NET SQL Server driver will be done in Microsoft.Data.SqlClient, released as a NuGet package for both .NET Core and .NET Framework. To keep with the latest developments, we need to use that instead of System.Data.SqlClient.

Describe the solution you'd like
Replace System.Data.SqlClient with Microsoft.Data.SqlClient
This issue #38 was written up 4 years ago, with no progress. System.Data.SqlClient has issues with Transaction Scope.

Additional context
On the other hand, we would like to get some clarity if this repo is still actively maintained. The solution contains a number of frameworks and nuget packages that have been deprecated.