Corected array type.

Author: dlemstra

tests/Magick.NET.Tests/Pixels/PixelTests/TheEqualsMethod.cs

@@ -132,7 +132,7 @@ public void ShouldReturnTrueWhenImageHasNoChannelsAndValueIsNull()
                     {
                         using (var pixels = new UnsafePixelCollection(image))
                         {
-                            var pixel = Pixel.Create(pixels, 0, 0, Array.Empty<byte>());
+                            var pixel = Pixel.Create(pixels, 0, 0, Array.Empty<QuantumType>());
 
                             Assert.True(pixel.Equals((MagickColor)null));
                         }

tests/Magick.NET.Tests/Pixels/PixelTests/TheToColorMethod.cs

@@ -28,7 +28,7 @@ public void ShouldReturnNullWhenImageHasNoChannels()
                 {
                     using (var pixels = new UnsafePixelCollection(image))
                     {
-                        var pixel = Pixel.Create(pixels, 0, 0, Array.Empty<byte>());
+                        var pixel = Pixel.Create(pixels, 0, 0, Array.Empty<QuantumType>());
 
                         Assert.Null(pixel.ToColor());
                     }