misc: change pyupgrade target version to 3.9 (#75442)

.pre-commit-config.yaml

@@ -2,10 +2,10 @@
 # See https://pre-commit.com/hooks.html for more hooks
 repos:
 -   repo: https://github.com/asottile/pyupgrade
-    rev: v3.1.0
+    rev: v3.3.1
     hooks:
     - id: pyupgrade
-      args: ['--keep-percent-format', '--py37-plus']
+      args: ['--keep-percent-format', '--py39-plus']
 -   repo: https://github.com/adamchainz/django-upgrade
     rev: 1.13.0
     hooks:

lingo/pricing/models.py

@@ -18,7 +18,6 @@ import copy
 import dataclasses
 import datetime
 import decimal
-from typing import List
 
 from django.db import models
 from django.template import Context, RequestContext, Template, TemplateSyntaxError, VariableDoesNotExist
@@ -398,13 +397,13 @@ class PricingMatrixCell:
 @dataclasses.dataclass
 class PricingMatrixRow:
     criteria: Criteria
-    cells: List[PricingMatrixCell]
+    cells: list[PricingMatrixCell]
 
 
 @dataclasses.dataclass
 class PricingMatrix:
     criteria: Criteria
-    rows: List[PricingMatrixRow]
+    rows: list[PricingMatrixRow]
 
 
 class AgendaPricing(models.Model):