Fix for: Configure with code is not working because of ArgumentException

[Schaeri]

In the last release of ligershark/WebOptimizer, a new feature was added to configure the package directly in the source code. I tested the new release and found an issue when using the new feature.

During startup, the application crashed because of this error:

Unhandled exception. System.ArgumentException: Implementation type cannot be 'Microsoft.Extensions.Options.IConfigureOptions1[WebOptimizer.WebOptimizerOptions]' for 'Microsoft.Extensions.Options.IConfigureOptions1[WebOptimizer.WebOptimizerOptions]'. (Parameter 'descriptor') at Microsoft.Extensions.DependencyInjection.Extensions.ServiceCollectionDescriptorExtensions.TryAddEnumerable(IServiceCollection services, ServiceDescriptor descriptor) at Microsoft.Extensions.DependencyInjection.ServiceExtensions.RegisterComponents(IServiceCollection services, Action1 assetPipeline, ServiceDescriptor configureOptions) in /home/rc/Code/devigus-github/WebOptimizer/src/WebOptimizer.Core/Extensions/ServiceExtensions.cs:line 133 at Microsoft.Extensions.DependencyInjection.ServiceExtensions.AddWebOptimizer(IServiceCollection services, Action1 assetPipeline, Action1 configureWebOptimizer) in /home/rc/Code/devigus-github/WebOptimizer/src/WebOptimizer.Core/Extensions/ServiceExtensions.cs:line 97 at WebOptimizerDemo.Startup.ConfigureServices(IServiceCollection services) in /home/rc/Code/devigus-github/WebOptimizer/sample/Startup.cs:line 20 at System.RuntimeMethodHandle.InvokeMethod(Object target, Void* arguments, Signature sig, Boolean isConstructor) at System.Reflection.MethodInvoker.Invoke(Object obj, IntPtr args, BindingFlags invokeAttr) at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture) at Microsoft.AspNetCore.Hosting.ConfigureServicesBuilder.InvokeCore(Object instance, IServiceCollection services) at Microsoft.AspNetCore.Hosting.GenericWebHostBuilder.UseStartup(Type startupType, HostBuilderContext context, IServiceCollection services, Object instance) at Microsoft.Extensions.Hosting.HostBuilder.InitializeServiceProvider() at Microsoft.Extensions.Hosting.HostBuilder.Build() at WebOptimizerDemo.Program.Main(String[] args)`

This pull request fixes the issue ( #269) by configuring the required generic argument.

Sorry for the inconvenience, but now the feature has been better tested and it works.

[madskristensen]

Thanks

[Schaeri]

Thanks a lot for your help.