Test with ColorTypes 0.11 only to isolate Julia 1.6 failure

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: ViralBShah

Project.toml

@@ -21,7 +21,7 @@ julia = "1.6"
 Aqua = "0.8"
 CSVFiles = "1"
 CodecZlib = "0.7"
-ColorTypes = "0.11, 0.12"
+ColorTypes = "0.11"
 Downloads = "1.4"
 FilePathsBase = "0.9"
 HTTP = "1"