magick 2.7.2

• Reintroduce a separate image_coalesce() function (cf image_animate)
• Automatically coalesce gif images when reading by default
• Fix compatibility with super old ImageMagick for CentOS < 7.7
• Fix build for ucrt64 on Windows

magick 2.7.0

• New functions image_shade, image_motion_blur, image_ordered_dither,
  image_level to support ggfx.

magick 2.6.0

• image_write() gains a compression parameter
• Updated binaries for Windows/MacOS to ImageMagick-6.9.11-57
• Added libraw and libheif delegates to Windows/MacOS binaries