fix python-gino/gino#486, add Starlette support

Author: wwwjfy

gino/ext/quart.py

@@ -1,6 +1,8 @@
 import asyncio
 
+# noinspection PyPackageRequirements
 from quart import Quart, request
+# noinspection PyPackageRequirements
 from quart.exceptions import NotFound
 from sqlalchemy.engine.url import URL