Merge branch '3.1' into 3.x

Author: cowtowncoder

release-notes/VERSION

@@ -46,7 +46,7 @@ Active maintainers:
 
 No changes since 3.1.0
 
-3.1.3 (not yet released)
+3.1.3 (01-May-2026)
 
 #343: Deserialization Failed when an unknown property is added in JSON
   when using Afterburner Module