Mark as development dependency

[biohazard999]

The nuget package is missing the <DevelopmentDependency>true</DevelopmentDependency> flag.

When installed the transient dependencies (for example Microsoft.CodeAnalysis.CSharp) will be included in the clients project.

When installed via nuget it will mark the PackageReference automatically like:

<PackageReference Include="EnumUtilitiesGenerator" Version="0.1.6">
  <PrivateAssets>all</PrivateAssets>
  <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
</PackageReference>

[CyberBotX]

I just started using this library and I found a probably semi-related problem. Because the generated GenerateHelperAttribute class and GenerateHelperOption enum are not namespaced at all, if you use this library in one assembly and then make that assembly a dependent of another and also try to use this library there, it gives a CS0436 warning for a conflict with an imported type. This is even after manually applying the extra elements to the PackageReference that biohazard999 suggested to my own csproj files. While I could just suppress the warning in the project settings, that seems less desirable.