Update messages.json

Author: justinfx

messages.json

@@ -7,5 +7,6 @@
     "3.0.0": "messages/3.0.0.md",
     "3.0.1": "messages/3.0.1.md",
     "3.0.2": "messages/3.0.2.md",
-    "3.0.3": "messages/3.0.3.md"
+    "3.0.3": "messages/3.0.3.md",
+    "3.0.4": "messages/3.0.4.md"
 }