Add __future__.annotations import

Signed-off-by: Patrick ZAJDA <[email protected]>

Author: Nardol

pysmsboxnet/api.py

@@ -1,5 +1,7 @@
 """smsbox.net api client module."""
 
+from __future__ import annotations
+
 import asyncio
 
 from aiohttp import ClientSession

tests/test_api.py

@@ -1,5 +1,7 @@
 """Tests for pysmsboxnet."""
 
+from __future__ import annotations
+
 import random
 
 import aiohttp