SkiaSharp: [BUG] DllNotFoundException: Unable to load shared library 'libSkiaSharp' or one of its dependencies.

Description

SkiaSharp does not work under MacOS and Ubuntu 18.04. I have a .net core 1.1 web application (vanilla stuff). It builds and runs fine, but when I access skia it results in the following error:

`DllNotFoundException: Unable to load shared library 'libSkiaSharp' or one of its dependencies. In order to help diagnose loading problems, consider setting the LD_DEBUG environment variable: liblibSkiaSharp: cannot open shared object file: No such file or directory

SkiaSharp.SkiaApi.sk_memorystream_new()
SkiaSharp.SKMemoryStream..ctor()
SkiaSharp.SKMemoryStream..ctor(byte[] data)
SkiaSharp.SKBitmap.Decode(byte[] buffer)
ImageProcessor.ResizePng(byte[] data, int size) in ImageProcessor.cs

Code

   internal static class ImageProcessor
    {
      public  static byte[] ResizePng(byte[] data, int size)
        {
            using (var bitmap = SKBitmap.Decode(data))
            {
                var widthHeight = Math.Min(bitmap.Width, bitmap.Height);
                var scale = (float)size / widthHeight;
                var newInfo = new SKImageInfo((int)(bitmap.Width * scale), (int)(bitmap.Height * scale));

                using (var scaled = bitmap.Resize(newInfo, SKFilterQuality.High))
                    return ToPngData(scaled);
            }
        }

Expected Behavior

It works fine under windows and should also under MacOS and Linux

Actual Behavior

see above.

Basic Information

• Version with issue: 1.68.0
• IDE: Visual Studio / Visual Studio Code
• Platform Target Frameworks: netstandard2.0/netcoreapp2.2
  • Linux: Ubuntu 18.04
  • macOS: current
  • Windows Classic: (it works under windows 10 1809)

Screenshots

Reproduction Link