Bump version to 0.4.0

Author: atasoglu

pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "sqlite-vec-client"
-version = "0.3.0"
+version = "0.4.0"
 description = "A tiny Python client around sqlite-vec for CRUD and similarity search."
 readme = "README.md"
 requires-python = ">=3.9"