Fix readme on Nuget

[sungam3r]

Sad news. Does this mean that other projects also have this problem? I see readme in graphql-dotner but not parser 🤔 . Looks a bit weird. How about just move property out of Condition?

  <PropertyGroup>
    <PackageReadmeFile>README.md</PackageReadmeFile>
  </PropertyGroup>

The same for AnalysisMode. I understand it requires a bit more work but it should not be difficult. I propose to add CA1707 into NoWarn in Tests.props . After that I see only ~60 issues to fix 😉 . I think this is better than jumping over different order of conditions in MSBuild.

Originally posted by @sungam3r in graphql-dotnet/server#897 (comment)