Binary targeting .NET Framework 4.5?

[rohanp-91]

Would it be possible to add support for .NET Framework 4.5? I need it for a project that's still targeting net45 and since the package currently supports .NET Standard 2.0, I had to create a new package out of it, after adding necessary targeting. It'd be great if that can be added here (maybe a different branch that can create a new package?) I am not sure if any of the previous versions have a support for net45.