Update mypy to 1.20.0

This commit also removes a cast that is no longer needed after
python/mypy#20602

Author: correctmost

.pre-commit-config.yaml

@@ -31,7 +31,7 @@ repos:
       args: [--config=.flake8]
       fail_fast: true
   - repo: https://github.com/pre-commit/mirrors-mypy
-    rev: v1.19.1
+    rev: v1.20.0
     hooks:
     - id: mypy
       args: [

archinstall/lib/menu/list_manager.py

@@ -80,7 +80,6 @@ async def _run(self) -> list[ValueT] | None:
 					raise ValueError('Unhandled return type')
 
 			if value in self._base_actions:
-				value = cast(str, value)
 				self._data = await self.handle_action(value, None, self._data)
 			elif value in self._terminate_actions:
 				break

pyproject.toml

@@ -33,7 +33,7 @@ Source = "https://github.com/archlinux/archinstall"
 [project.optional-dependencies]
 log = ["systemd_python==235"]
 dev = [
-    "mypy==1.19.1",
+    "mypy==1.20.0",
     "flake8==7.3.0",
     "pre-commit==4.5.1",
     "ruff==0.15.7",