Support configuration for which field sets the version

[clairernovotny]

It would be useful if there was a way to specify which of the NB.GV fields is used for the CloudBuildNumber, Version, PackageVersion and Version fields. It can default to what it does today, but there may be times when it's needed to override them.

Today, that means messing with MSBuild: https://github.com/onovotny/bc-csharp/blob/netstandard/scripts/setversion.csproj#L12-L19

If there's a .NET Core Global Tool (#181), that manipulation option isn't available.

[AArnott]

When is PackageVersion not providing the right package version?
Is this still an issue?

[AArnott]

Closing due to no response.

[clairernovotny]

This would address the four part version issue by making it configurable.