Fix import error due to not having starlette installed

Author: EvieePy

twitchio/web/utils.py

@@ -22,17 +22,20 @@
 SOFTWARE.
 """
 
+from __future__ import annotations
+
 import abc
 import hashlib
 import hmac
 import logging
 from typing import TYPE_CHECKING, Any
 
 from aiohttp import web
-from starlette.requests import Request
 
 
 if TYPE_CHECKING:
+    from starlette.requests import Request
+
     from ..types_.eventsub import EventSubHeaders