Building NuGet package for debugging in XF 3.6 and up

I run these commands to create the Nuget packages, then move them into my local nuget folder.

`Go to the Xamarin.Forms folder in Powershell, then allow for all scripts to be run with this:

Set-ExecutionPolicy Unrestricted -Scope CurrentUser -Force
./Build.ps1 -Target NugetPack

`
However, the nuget packages it makes aren't liked by VS 2017.

When I used to run the batch file : .create-nuget.bat it would create a version 9.9.9 which I could then upgrade my solution to.