Allow a HttpClient instance to be provided

[mgoodfellow]

It would be useful for .NET Core apps to be able to provide an instance of a HttpClient - this allows us to wire up the HttpClientFactory for better resource use.

Example in our application (SimpleInjector):

Container.Register<ISocketLabsClient>(
    () =>
    {
        var httpClientFactory = Container.GetInstance<IHttpClientFactory>();
        return new SocketLabsClient(socketLabsConfig.ServerId, socketLabsConfig.ApiKey, httpClientFactory.CreateClient());
    },
    Lifestyle.Scoped);

Feeback welcome

[mgoodfellow]

Any chance of getting this merged?

[MattReibach]

Hi Mike, thank you for your contribution. I am merging in your pull request and it will be included in our next package release. We will be updating our TargetFrameworks to include .NET 5.0 and hope to publish this release in the next few days. Thanks again for your contribution and your patience in waiting for the changes to be reviewed and merged.