Update required python version

Author: jhossbach

pyproject.toml

@@ -10,7 +10,7 @@ authors = [
 version = "1.6.0"
 description = "Ruff linting plugin for pylsp"
 readme = "README.md"
-requires-python = ">=3.7"
+requires-python = ">=3.8"
 license = {text = "MIT"}
 dependencies = [
   "ruff>=0.1.5, <0.2.0",