9.0.0

This release contains a small, but breaking change. In order to provide a simpler interface, the IMediator interface is now split into two interfaces, a sender and publisher:

public interface ISender
{
    Task<TResponse> Send<TResponse>(IRequest<TResponse> request, CancellationToken cancellationToken = default);

    Task<object?> Send(object request, CancellationToken cancellationToken = default);
}

public interface IPublisher
{
    Task Publish(object notification, CancellationToken cancellationToken = default);

    Task Publish<TNotification>(TNotification notification, CancellationToken cancellationToken = default)
        where TNotification : INotification;
}

public interface IMediator : ISender, IPublisher
{
}

The main motivation here is that sending should be a top-level concern of an application, but publishing can happen anywhere. This interface segregation should help catch design errors, where should never send requests from anywhere inside a request handler.