The newest version of the roslyn unity analyzers are released before they appear as an upgrade within Visual Studio and adding them manually is a lot harder than I thought. NuGet doesn't seem to work. I also tried unpacking the NuGet file and editing the .csproj file directly. But the .csproj file is recreated each time you open Visual Studio, losing those changes. Thankfully there's a supported way.

In this post I show how to install the latest Roslyn Unity Analyzers into your unity project.