Suppress dependencies when packing

Some packing scenarios, especially those involving tools, require ignoring all dependencies (PackageReference as well as framework references) from the resulting package dependencies.

I learned of a property supported by dotnet pack for this:

<PropertyGroup>
  <SuppressDependenciesWhenPacking>true</SuppressDependenciesWhenPacking>
</PropertyGroup>

NuGetizer has more flexibility in this regard, providing both a $(PackFrameworkReferences) property as well as granular control over referenced packages via the Pack metadata on each PackageReference:

<PropertyGroup>
  <!-- Opt out of all framework references/dependencies -->
  <PackFrameworkReferences>false</PackFrameworkReferences>
</PropertyGroup>

<ItemDefinitionGroup>
  <PackageReference>
    <!-- Unless specified otherwise, opt-out of all dependencies -->
    <Pack>false</Pack>
  </PackageReference>
</ItemDefinitionGroup>

<ItemGroup>
  <!-- Example of explicitly opting in for a particular one -->
  <PackageReference Include="Foo" Pack="true" />
  <PackageReference Include="Bar" /> <!-- Will not be packed -->
</ItemGrop>

But in order to simplify this scenario further, both the compatibility SuppressDependenciesWhenPacking property as well as a new PackDependencies property is supported in nugetizer to achieve the same.