Add __future__ imports for older python

api.py

@@ -1,3 +1,4 @@
+from __future__ import annotations
 from aiohttp import web
 from typing import NamedTuple
 import json

nsfw.py

@@ -1,3 +1,4 @@
+from __future__ import annotations
 from weakref import ref as WeakRef
 from pathlib import Path
 from tqdm import tqdm

translation.py

@@ -6,6 +6,7 @@ language code. Text fragments after a language directives are translated.
 If the language is `en` text is passed through unmodified.
 """
 
+from __future__ import annotations
 import re
 from functools import cache
 from typing import NamedTuple