• document all supported Image formats in the GD::Image lib
  
• added Github actions (for PR's)
  
• fix poly->transform documentation RT #140043
  
• fix GD,GD2 detection and tests RT #139399 (since libgd 2.3.3)
  fixed tests by Håkon Hægland.
  
• POD: Remove indirect object constructors from example code snippet (PR #39)
  
• patch from Ben Crowell that fixes incorrect behaviour of GD::Simple->fontMetrics
  
• fix cross-compilation if gdlib.pc has no cflags by Fabrice Fontaine