chore: bump version to 0.5.0

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: crispasr integration

pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "crisptts"
-version = "0.4.0"
+version = "0.5.0"
 description = "Modular German Text-to-Speech synthesizer with 28+ TTS engines"
 readme = "readme.md"
 license = "EUPL-1.2"