Update changelog for 5.4.0-1 release

debian/changelog

+php-parser (5.4.0-1) unstable; urgency=medium
+
+  [ Ondrej Mirtes ]
+  * Promoted properties with hooks do not need visibility modifier
+  * Add flags helper methods `Property::isAbstract()` and `Property::isFinal()`
+  * Add `PropertyHook::isFinal()` helper method with tests
+  * Emit error - Multiple properties cannot share the same hooks
+
+  [ Nikita Popov ]
+  * Make PropertyHook::getStmts() less incorrect
+  * Fix PropertyHook::getStmts() for set hook
+  * Release PHP-Parser 5.4.0
+
+ -- David Prévot <taffit@debian.org>  Wed, 01 Jan 2025 12:14:31 +0100
+
 php-parser (5.3.1-2) unstable; urgency=medium
 
   * Source-only upload for testing migration