Use python3.10 for GH workflows, fix postgres range issues in tests.

.github/workflows/main-ci.yml

@@ -11,7 +11,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ['3.9']
+        python-version: ['3.10']
 
     services:
       redis:

cachalot/tests/postgres.py

@@ -5,7 +5,11 @@ from unittest import skipUnless
 from django.contrib.postgres.functions import TransactionNow
 from django.db import connection
 from django.test import TransactionTestCase, override_settings
-from psycopg2.extras import DateRange, DateTimeTZRange, NumericRange
+from django.db.backends.postgresql.psycopg_any import (
+    DateRange,
+    DateTimeTZRange,
+    NumericRange,
+)
 from pytz import timezone
 
 from ..utils import UncachableQuery