Support "favicon.ico" with multiple sizes

[kurema]

"favicon.ico" have multiple sizes in many case, like 16x16 and 32x32.
Using ImageMagick.MagickImageCollection instead of ImageMagick.MagickImage is a easy way to handle them.

[kurema]

Like this:
https://github.com/James231/WebImageExtractor/blob/master/WebImageExtractor/ImageDownloader.cs#L55

                using (Stream stream = await response.Content.ReadAsStreamAsync())
                {
                    MagickImage image = null;
                    image = new MagickImageCollection(stream, uri.ToMagickFormat());
                    return image;
                }

[James231]

Thanks for raising this 🙂
I'll consider adding it in the next update. But, I can't make any promises of when that will be.

If anyone reading this wants it added, please thumbs up 👍 or bump the thread. And submitting a PR is also welcome.

[kurema]

I submitted PR.