Support vcxproj projects to switch around C++/CLI TargetFrameworkVersion

[Simulacrux]

Hello,

great extension you are provided. Helped us alot in the current process to update to .NET 4.8. But we also have a bunch of C++/CLI .vcxproj projects, which are also including the <TargetFrameworkVersion> to determine which .NET version they are using in the code bridge.

Maybe you could think about supporting also this kind of projects in the next release.

Normally something like this is the structure we see in this projects.

<PropertyGroup Label="Globals">
    <ProjectGuid>{A0B407EF-776B-46F8-9072-2332BA7855DE}</ProjectGuid>
    <RootNamespace>RootNamespace</RootNamespace>
    <Keyword>MFCProj</Keyword>
    <TargetFrameworkVersion>v4.5</TargetFrameworkVersion>
</PropertyGroup>

Would also be happy to help to test this feature, if you need help there.

Best regards Simulacrux