Update Directory.Build.props

Fix version

Enable calling AuthorizeWith() on a Schema directly (graphql-dotnet#470)

Replaced GraphiQL with GraphiQLWithExtensions (includes GraphiQL expl…

…orer) (graphql-dotnet#455)

Add GraphQLHttpMiddleware.RequestExecutingAsync (graphql-dotnet#435)

fix ArgumentNullException (graphql-dotnet#428)

Extensions for GraphQLRequest and repo rework (graphql-dotnet#372)

Bump Serilog from 2.8.0 to 2.10.0 (graphql-dotnet#419)

Updates for GitHub Actions

Replace Appveyor with GitHub Actions (graphql-dotnet#391)