Unpin flake8 now that it's fixed, fix a few lint errors.

bemani/backend/jubeat/base.py

@@ -167,7 +167,7 @@ class JubeatBase(CoreHandler, CardManagerHandler, PASELIHandler, Base):
             return None
 
         cache_key = f"get_scores_by_extid-{extid}"
-        score: Optional[List[Score]]
+        scores: Optional[List[Score]]
 
         if partition == 1:
             # We fetch all scores on the first partition and then divy up

requirements.txt

@@ -1,3 +1,4 @@
+setuptools
 Cython
 SQLAlchemy<2.0.0
 alembic
@@ -16,7 +17,7 @@ types-Werkzeug
 types-Flask
 types-freezegun
 types-python-dateutil
-flake8==4.0.1
+flake8
 typed-ast
 freezegun
 pyreact @ git+https://github.com/DragonMinded/react-python@main

verifylint

@@ -1,3 +1,3 @@
 #! /bin/bash
 
-flake8 bemani/ --ignore E203,E501,E252,E704,E741,W503,W504,B006,B008,B009 | grep -v "migrations\/"
+flake8 bemani/ --ignore E203,E501,E252,E704,E721,E741,W503,W504,B006,B008,B009 | grep -v "migrations\/"