Add support for Net 9

[rizi]

This pull request updates lamar to .net 9 and all of its dependencies, this should fix #405.

As already mentioned via discord, there seems to be a timing problem in asp.net core 9 in combination with lamar.

These tests in MinimalApiTests.integration_tests are red, it can be fixed when adding this two lines of code, after the call of .UseLamar(....) and builder.Build() and before the call of app.Run();

var container = (IContainer)app.Services;
container.GetServices<Microsoft.AspNetCore.Diagnostics.IDeveloperPageExceptionFilter>();

Note
This workaround also works in real world asp.net core 9 applications.

The error when running the tests or starting a real world asp.net core 9 application
Unable to resolve service for type 'System.Collections.Generic.IEnumerable`1[Microsoft.AspNetCore.Diagnostics.IDeveloperPageExceptionFilter]' while attempting to activate 'Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddlewareImpl'.
at Microsoft.Extensions.DependencyInjection.ActivatorUtilities.ConstructorMatcher.CreateInstance(IServiceProvider provider)
at Microsoft.Extensions.DependencyInjection.ActivatorUtilities.CreateInstance(IServiceProvider provider, Type instanceType, Object[] parameters)

I also added a break point in Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddlewareImpl and the IEnumerable<Microsoft.AspNetCore.Diagnostics.IDeveloperPageExceptionFilter> is always empty, so it's seems there is some kind of timing issue when using Lamar (therefore it's not a problem with a missing registration).

Input from @jeremydmiller
Somehow the IEnumerable<Microsoft.AspNetCore.Diagnostics.IDeveloperPageExceptionFilter> is not even tried to be resolved by lamar (except when calling container.GetServices<Microsoft.AspNetCore.Diagnostics.IDeveloperPageExceptionFilter>(); before (maybe cached by aspnet.core)?)

Edit
Other dependencies are resolved by lamar

But of course that isn't a real solution, any help would highly be appreciated.