This update for GraphicsMagick fixes the following issues:

- CVE-2019-12921: Fixed an issue where text filename components potentially coulf have 
  allowed reading of arbitrary files via TranslateTextEx (boo#1167208).
- CVE-2020-10938: Fixed an integer overflow and resultant heap-based buffer overflow in 
  HuffmanDecodeImages (boo#1167623).
  
This update was imported from the openSUSE:Leap:15.1:Update update project.