CompatHelper: add new compat entry for "Cassette" at version "0.3" (#25)

Co-authored-by: Tom Short <tshort.rlists@gmail.com>

Author: github-actions[bot]

Project.toml

@@ -12,6 +12,7 @@ MacroTools = "1914dd2f-81c6-5fcd-8719-6d5c9610ff09"
 TypedCodeUtils = "687fb87b-adea-59d5-9be9-82253b54685d"
 
 [compat]
+Cassette = "0.3"
 LLVM = "1.3"
 TypedCodeUtils = "0.1"
 MacroTools = "0.5"