drop python3.6 support
python 3.6 reached end of life on 2021-12-23
Committed via https://github.com/asottile/all-repos
diff --git a/pre_commit_hooks/check_symlinks.py b/pre_commit_hooks/check_symlinks.py
index db3b4fe..a85c82a 100644
--- a/pre_commit_hooks/check_symlinks.py
+++ b/pre_commit_hooks/check_symlinks.py
@@ -1,10 +1,11 @@
+from __future__ import annotations
+
import argparse
import os.path
-from typing import Optional
from typing import Sequence
-def main(argv: Optional[Sequence[str]] = None) -> int:
+def main(argv: Sequence[str] | None = None) -> int:
parser = argparse.ArgumentParser(description='Checks for broken symlinks.')
parser.add_argument('filenames', nargs='*', help='Filenames to check')
args = parser.parse_args(argv)
