chore(deps): update dependency pytest to v8 (#296)

Author: renovate-bot

requirements-test.txt

@@ -2,7 +2,7 @@ asyncpg==0.29.0
 mock==5.1.0
 pg8000==1.31.1
 psycopg2-binary==2.9.9
-pytest==7.4.4
+pytest==8.1.1
 pytest-asyncio==0.23.6
 pytest-cov==4.1.0
 pytest-aiohttp==1.0.5