Magick.NET 7.0.5.900

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

• Transient error validating the JPEG-2000 image format (reference ImageMagick/ImageMagick#501).
• Properly allocate DCM image colormap (reference https://www.imagemagick.org/discourse-server/viewtopic.php?f=3&t=32063).