Magick.NET 8.3.0

Changes in Magick.NET:

• Added new ReadThumbnail option to the DngReadDefines (#1006).

Related changes in @ImageMagick since the last release of Magick.NET:

• Tweak the bilevel image type (reference ImageMagick/ImageMagick#4121).
• Converting from LAB to RGB leads to wrong colors (reference ImageMagick/ImageMagick#4105).

Library updates:

• Magick.NET.Core 8.3.0
• Magick.NET.SystemDrawing 4.0.5
• Magick.NET.SystemWindowsMedia 4.0.5
• ImageMagick 7.1.0-6 (2021-09-04)
• highway 0.14.0 (2021-07-29)
• jpeg-xl 0.5.0 (2021-08-02)