Updated changelog

Author: FlorianRappl

CHANGELOG.md

@@ -3,6 +3,7 @@
 Released on Tuesday, March 31 2020.
 
 - Fixed issue with empty content (#42)
+- Added debugger display attribute to CSS rules (#43)
 - Fixed handling of CSS gradients (#45)
 - Improved CSS string representation of gradients (#46)
 - Added support for the .NET Framework 4.6.1 target