Add support for annotations

jupyter_kernel_client/client.py

@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 import datetime
 import typing as t
 from functools import partial

jupyter_kernel_client/consoleapp.py

@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 import os
 import signal
 import typing as t

jupyter_kernel_client/shell.py

@@ -2,6 +2,8 @@
 #
 # BSD 3-Clause License
 
+from __future__ import annotations
+
 import asyncio
 
 from jupyter_core.utils import ensure_async

jupyter_kernel_client/utils.py

@@ -11,6 +11,8 @@
 - https://github.com/jupyter-server/jupyter_server/blame/v2.12.0/jupyter_server/_tz.py
 """
 
+from __future__ import annotations
+
 from datetime import datetime, timedelta, timezone, tzinfo
 from typing import Any, List