Possible null reference argument for parameter 'inputSettings' when installing the NuGet package

I can't build my project after simply just installing the package

Installing:
```
NuGet\Install-Package Dapplo.Confluence -Version 1.0.36
```

Leads to the build error:
```
Possible null reference argument for parameter 'inputSettings' in 'ProjectToolkitSettings.ProjectToolkitSettings(Dictionary<string, string> inputSettings)'.
```