Add support for IServiceProvider in exception handling

[nh43de]

• added another extension method to support passing of IServiceProvider when handling exceptions

• added IServiceProvider parameter to the BackgroundQueue class to support new extension method

Now user can access services when handling exceptions, like this

services.AddBackgroundQueue(maxConcurrentCount: 1, millisecondsToWaitBeforePickingUpTask: 1000,
    onException: (_, exception) =>
    {
        _.GetService<YourLogger>().LogError(exception, "There was an error in the background queue.");
    });

[DalSoft]

Like it thanks for taking the time to create a PR. I'll pull it in and push it up to nuget shortly

[DalSoft]

This is implemented in v2.0