increase min. ruff version

Author: jhossbach

pyproject.toml

@@ -13,7 +13,7 @@ readme = "README.md"
 requires-python = ">=3.7"
 license = {text = "MIT"}
 dependencies = [
-  "ruff>=0.0.260",
+  "ruff>=0.0.267",
   "python-lsp-server",
   "lsprotocol>=2022.0.0a1",
   "tomli>=1.1.0; python_version < '3.11'",