NuGet Package Dependency Not Found for 1.5.6.1

The latest version of `SharpZstd` published on NuGet ([1.5.6.1](https://www.nuget.org/packages/SharpZstd/1.5.6.1#dependencies-body-tab)) is dependent on `SharpZstd.Interop` 1.5.6.1, but the latest version of `SharpZstd.Interop` that was published is [1.5.6](https://www.nuget.org/packages/SharpZstd.Interop/#versions-body-tab), which means that `SharpZstd v1.5.6.1` cannot be restored.
