Update tested-with in cabal file

Author: harendra-kumar

packdiff.cabal

@@ -15,6 +15,12 @@ maintainer:          streamly@composewell.com
 copyright:           2022 Composewell Technologies
 -- category:
 build-type:          Simple
+tested-with:
+    GHC==9.14.1
+  , GHC==9.12.4
+  , GHC==9.10.3
+  , GHC==9.8.4
+  , GHC==9.6.3
 extra-doc-files:  README.md, CHANGELOG.md
 
 common compile-options