Prepare 19.6.0 release.

Author: HexDecimal

CHANGELOG.md

@@ -6,6 +6,8 @@ This project adheres to [Semantic Versioning](https://semver.org/) since version
 
 ## [Unreleased]
 
+## [19.6.0] - 2025-10-20
+
 ### Added
 
 - Alternative syntax for number symbols with `KeySym`, can now specify `KeySym["3"]`, etc.

tcod/event.py

@@ -2240,7 +2240,7 @@ class KeySym(enum.IntEnum):
         SDL backend was updated to 3.x, which means some enums have been renamed.
         Single letters are now uppercase.
 
-    .. versionchanged:: Unreleased
+    .. versionchanged:: 19.6
         Number symbols can now be fetched with ``KeySym["9"]``, etc.
         With Python 3.13 or later.