Update all relevant .csproj files with the following:

<ItemGroup>
    <None Update="xunit.runner.json">
      <CopyToOutputDirectory>Always</CopyToOutputDirectory>
    </None>
</ItemGroup>

The current value is `PreserveNewer` but we had test failing because somehow the copy in the output directory was wrong (but newer) and was not getting updated on a build, which resulted in tests not passing.