Dependency to System.Net.Requests 4.0.0 breaks netcore compatibility

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Hi,

I have an application targeting netcoreapp2.0.

 Install-Package SwiftClient.AspNetCore -Version 1.0.0-beta-0016

gives the following warning

C:\code\github\IISDService\IISDService\IISDService.csproj : warning NU1701: Package 'System.Net.Requests 4.0.0' was restored using '.NETFramework,Version=v4.6.1' instead of the project target framework '.NETCoreApp,Version=v2.0'. This package may not be fully compatible with your project.

tried netstandard1.6 and netstandard1.3 and got the same/similar compatibily warning.

[mattchatterley]

I'm also experiencing this and it's very annoying - have you managed to resolve?

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@mattchatterley
I implemented the same thing as seen in this PR:
#6
and that solved my issue.