Bump version to 6.0.4 and update changelog

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: zmievsa

CHANGELOG.md

@@ -5,6 +5,23 @@ Please follow [the Keep a Changelog standard](https://keepachangelog.com/en/1.0.
 
 ## [Unreleased]
 
+## [6.0.4]
+
+### Added
+
+- Python 3.14 support (#345)
+
+### Fixed
+
+- Fixed missing type imports with future annotations in `Depend` leading to `RecursionError` in `generate_versioned_routers` by @Shigerman (#329)
+- Resolved `'__getitem__' requires a 'typing.Union'` error by @ulgens (#336)
+- Adopted Python 3.14 related union handling changes by @ulgens (#337)
+- Adopted Python 3.14 related `http.cookies` changes by @ulgens (#338)
+
+### Removed
+
+- Python 3.9 support by @ulgens (#342)
+
 ## [6.0.3]
 
 ### Fixed

pyproject.toml

@@ -1,6 +1,6 @@
 [project]
 name = "cadwyn"
-version = "6.0.3"
+version = "6.0.4"
 description = "Production-ready community-driven modern Stripe-like API versioning in FastAPI"
 authors = [{ name = "Stanislav Zmiev", email = "zmievsa@gmail.com" }]
 license = "MIT"