Drop Python 3.8 support in typeshed utilities (#13774)

lib/ts_utils/metadata.py

@@ -10,8 +10,8 @@ import urllib.parse
 from collections.abc import Mapping
 from dataclasses import dataclass
 from pathlib import Path
-from typing import Final, NamedTuple, final
-from typing_extensions import Annotated, TypeGuard
+from typing import Annotated, Final, NamedTuple, final
+from typing_extensions import TypeGuard
 
 import tomli
 import tomlkit

lib/ts_utils/utils.py

@@ -7,7 +7,7 @@ import sys
 from collections.abc import Iterable, Mapping
 from functools import lru_cache
 from pathlib import Path
-from typing import Any, Dict, Final, NamedTuple, Tuple
+from typing import Any, Final, NamedTuple
 from typing_extensions import TypeAlias
 
 import pathspec
@@ -111,8 +111,8 @@ def get_mypy_req() -> str:
 # Parsing the stdlib/VERSIONS file
 # ====================================================================
 
-VersionTuple: TypeAlias = Tuple[int, int]
-SupportedVersionsDict: TypeAlias = Dict[str, Tuple[VersionTuple, VersionTuple]]
+VersionTuple: TypeAlias = tuple[int, int]
+SupportedVersionsDict: TypeAlias = dict[str, tuple[VersionTuple, VersionTuple]]
 
 VERSIONS_PATH = STDLIB_PATH / "VERSIONS"
 VERSION_LINE_RE = re.compile(r"^([a-zA-Z_][a-zA-Z0-9_.]*): ([23]\.\d{1,2})-([23]\.\d{1,2})?$")