update CHANGES

Add the required line to the CHANGES.md file.

CHANGES.md

@@ -39,6 +39,7 @@ Core Grammars:
 - fix(reasonml) simplify syntax and align it with ocaml [jchavarri][]
 - fix(swift) `warn_unqualified_access` is an attribute [Bradley Mackey][]
 - enh(swift) macro attributes are highlighted as keywords [Bradley Mackey][]
+- enh(perl) add support for the new class system [Bruno Meneguele][]
 
 Dev tool:
 
@@ -60,6 +61,7 @@ Dev tool:
 [jchavarri]: https://github.com/jchavarri
 [aana-h2]: https://github.com/aana-h2
 [Nicholas Thompson]: https://github.com/NAThompson
+[Bruno Meneguele]: https://github.com/bmeneg
 
 
 ## Version 11.8.0