Consider looking for InvokeAsync too when configuring middleware through UseMiddleware

[javiercn]

UseMiddleware() will fail if your middleware has InvokeAsync instead of Invoke (which is a very common pattern) (VS will add Async suffix when you ctrl+. and a lot of people follow that convention)

We probably want to also change IMiddleware to support this in some way.
https://github.com/aspnet/HttpAbstractions/blob/dev/src/Microsoft.AspNetCore.Http.Abstractions/IMiddleware.cs#L23

[muratg]

We'll try to do this. If there's both Invoke and InvokeAsync, we'll throw.